Table of Contents
Motion and Time – Worksheets
Hello Students,
These 4 worksheets are developed to accompany your learning of the chapter “Motion and Time.” This chapter is a fundamental part of your science curriculum, offering insights into the concepts of motion and time measurement. Understanding these concepts is crucial for grasping the principles of physics and how they apply to everyday life.
In this chapter, you have studied-
- Types of Motion- Learning about different types of motion such as straight line, circular, and periodic motion.
- Speed- Understanding the concept of speed, how it is calculated, and its importance in determining how fast or slow an object is moving.
- Measuring Time- Exploring different methods and tools for measuring time, from simple pendulums to modern clocks.
- Distance-Time Graphs- Learning how to represent motion through distance-time graphs, which help visualise the speed and nature of motion.
The worksheets include a variety of questions designed to test your understanding of these key concepts. They range from simple recall questions to more complex problems that require you to apply what you’ve learned. By working through these worksheets, you’ll be able to reinforce your knowledge, prepare effectively for your exams, and gain a deeper understanding of the principles of motion and time.
Also Check – Revision Notes -Chapter 13 – Motion and Time
Worksheet 1 – Motion and Time – Student Worksheet (Unsolved)
Explain the Concepts-
(a) Define the four different types of motion and give an example for each.
(b) What is the difference between slow and fast motion? Provide an example to illustrate this difference.
Calculation Problems-
(a) Calculate the speed of a car that travels 150 km in 3 hours.
(b) A cyclist covers a certain distance in 2 hours at a speed of 10 km/h. How much distance did the cyclist cover?
True or False – Justify Your Answer-
(a) The standard unit of speed is metres per second. (T/F)
(b) A car moving with a constant speed has non-uniform motion. (T/F)
Multiple Choice Questions-
(a) Which unit is used for measuring large values of speed?
(i) m/s (ii) km/h (iii) cm/s (iv) mph
(b) What is a simple pendulum primarily used for?
(i) Measuring speed (ii) Measuring distance (iii) Measuring time (iv) Measuring temperature
Diagram-Based Question-
Draw a distance-time graph for a car that is moving with a constant speed of 60 km/h for 5 hours.
Application-Based Questions-
(a) How can understanding motion and time help in planning a trip?
(b) Explain the importance of a speedometer and an odometer in a vehicle.
Discussion-Based Questions
Discuss how the concept of average speed is useful in everyday life, providing examples.
Fill in the Blanks-
(a) The motion of a swing is an example of __________ motion.
(b) Speed is calculated as the ratio of __________ to __________.
Class 7 science -Chapter 13 – Motion and Time- Complete Notes
Worksheet 1 – Motion and Time – Solved Worksheet with Answer
Explain the Concepts-
(a) Four Types of Motion with Examples-
Uniform Motion- An object moves at a constant speed in a straight line. Example- A car moving on a straight highway at a constant speed.
Non-uniform Motion- The speed of the object changes over time. Example- A bus stopping and starting at different bus stops.
Periodic Motion- Motion that repeats itself at regular intervals. Example- The motion of a pendulum.
Circular Motion- An object moves in a circular path. Example- The moon orbiting the Earth.
(b) Difference Between Slow and Fast Motion-
Slow motion refers to an object moving at a lower speed, while fast motion refers to an object moving at a higher speed. Example- A turtle moves slower (slow motion) compared to a rabbit running (fast motion).
Calculation Problems-
(a) Speed of a Car Calculation-
Speed = Distance / Time = 150 km / 3 hours = 50 km/h.
(b) Distance Covered by Cyclist-
Distance = Speed x Time = 10 km/h x 2 hours = 20 km.
True or False – Justify Your Answer-
(a) The standard unit of speed is metres per second. (T) – Metres per second (m/s) is the SI unit for speed.
(b) A car moving with a constant speed has non-uniform motion. (F) – A car moving at a constant speed has uniform motion.
Multiple Choice Questions-
(a) Unit for Measuring Large Values of Speed-
Answer- (ii) km/h – Kilometres per hour is commonly used for larger speeds, especially in vehicles.
(b) Primary Use of a Simple Pendulum-
Answer- (iii) Measuring time – A simple pendulum is used for keeping time, as in pendulum clocks.
Diagram-Based Question-
Distance-Time Graph for Constant Speed-
Draw a straight line graph where the y-axis represents distance and the x-axis represents time. The line should have a constant positive slope, indicating a speed of 60 km/h over 5 hours.
Application-Based Questions-
(a) Planning a Trip with Motion and Time-
Understanding motion and time helps in estimating travel time, scheduling departures and arrivals, and ensuring efficient and timely travel planning.
(b) Importance of Speedometer and Odometer-
A speedometer shows the current speed of a vehicle, helping the driver maintain safe and legal speeds. An odometer measures the total distance travelled by a vehicle, useful for maintenance schedules and resale value.
Discussion-Based Questions
Usefulness of Average Speed-
Average speed is useful in everyday life for estimating travel times, comparing different routes or modes of transportation, and planning activities based on how long it takes to travel certain distances.
Fill in the Blanks-
(a) The motion of a swing is an example of periodic motion.
(b) Speed is calculated as the ratio of distance to time.
NCERT Exemplar Solutions- Class 7 Science- Chapter 13 – Motion and Time
Worksheet 2 – Motion and Time – Student Worksheet (Unsolved)
Define and Describe-
(a) Define ‘uniform speed’ and ‘non-uniform speed’ with examples.
(b) Explain the concept of ‘periodic motion’ and give two examples .
Calculation Questions-
(a) A car travels 200 km in 4 hours. Calculate its average speed.
(b) If a pendulum takes 2 seconds for a complete oscillation, calculate its frequency.
True or False (Justify your answer)-
(a) The speedometer of a vehicle shows the distance travelled by the vehicle. (T/F)
(b) A straight line on a distance-time graph indicates uniform speed. (T/F)
Application-Based Question-
(a) Describe how you would use a simple pendulum to measure a time period of 30 seconds.
Graph Interpretation-
(a) Draw a distance-time graph for an object moving with uniform speed and explain its significance.
Short Answer Questions-
(a) What are the standard units of speed and time?
(b) How does a speedometer in a vehicle function?
Practical Understanding-
(a) Why is it important to understand the concept of speed in daily life, particularly in traffic?
Comparative Analysis-
Compare the motion of the Earth around the Sun with the motion of a ceiling fan’s blade.
Critical Analysis-
Discuss the importance of accurate time measurement in scientific experiments.
Describe and Illustrate-
(a) Describe with a diagram the motion of an object that starts from rest, moves with uniform speed, and then comes to a stop.
NCERT Solutions for Class 7 Science Chapter 13-Motion and Time
Worksheet 2 – Motion and Time – Solved Worksheet with Answer
Define and Describe-
(a) Uniform speed is when an object covers equal distances in equal intervals of time. For example, a car moving at a steady speed of 60 km/h on a highway.
(b) Periodic motion is a motion that repeats itself after regular intervals of time. Examples include the swinging of a pendulum and the orbiting of the Earth around the Sun.
Calculation Questions-
(a) Average speed of the vehicle = Total Distance / Total Time = 200 km / 4 hours = 50 km/h.
(b) Frequency of the pendulum = 1 / Time Period = 1 / 2 seconds = 0.5 Hz.
True or False (Justify your answer)-
(a) A straight line on a distance-time graph indicates non-uniform speed. (False) – It indicates uniform speed.
(b) A speedometer in a vehicle shows the distance travelled. (False) – It shows the speed of the vehicle.
Application-Based Question-
(a) To measure 30 seconds using a simple pendulum, count the number of oscillations it makes in 30 seconds. Knowing the time period of one oscillation, the total time can be calculated.
Graph Interpretation-
(a) A horizontal line indicates the object is stationary, while a straight line with a positive slope indicates uniform speed. The steeper the slope, the faster the speed.
Short Answer Questions-
(a) The standard units of speed are metres per second (m/s) or kilometres per hour (km/h), and the standard unit of time is the second (s).
(b) A speedometer functions by measuring the rotational speed of the vehicle’s wheels and converting it into speed.
Practical Understanding-
(a) Understanding speed is crucial for safe driving, to ensure adherence to speed limits and to react appropriately in traffic.
Comparative Analysis-
The Earth’s motion around the Sun is an example of periodic and circular motion, while the ceiling fan’s blade demonstrates rotational motion.
Critical Analysis-
Accurate time measurement is essential in scientific experiments for precision, repeatability, and validation of results.
Describe and Illustrate-
(a) A distance-time graph for this motion would start at the origin (indicating rest), rise with a constant slope (uniform speed), and then become horizontal (indicating stop).
Chapter 13 – Motion and Time–Class 7 science- Question and Answer (Fill in the Blanks)
Worksheet 3 – Motion and Time – Student Worksheet (Unsolved)
Explain in Detail-
(a) Describe the concept of ‘uniform speed’ with an everyday example.
(b) Explain ‘periodic motion’ with two examples.
Calculation and Understanding-
(a) If a train covers 150 kilometres in 3 hours, calculate its average speed and explain what it signifies about the train’s motion.
(b) A pendulum completes one oscillation in 2 seconds. Calculate how many oscillations it will complete in one minute.
True or False with Justification-
(a) The odometer of a vehicle measures its speed. (T/F) – Justify your answer.
(b) The distance-time graph for an object moving with uniform speed is a straight line. (T/F) – Justify your answer.
Practical Application-
(a) How would you use a stopwatch to measure the time taken by a runner to complete a race?
Interpreting Graphs-
(a) What does a horizontal line in a distance-time graph indicate?
(b) If the slope of a distance-time graph increases with time, what does it tell about the object’s motion?
Units and Measurement-
(a) What are the standard units for measuring speed and time in this chapter?
(b) Explain the role of a speedometer in a vehicle.
Conceptual Application-
(a) Why is it important to know the average speed of a vehicle in long-distance travel?
Comparing Types of Motion-
Compare the motion of a pendulum with the motion of a fan’s blade.
Discussion Point-
Discuss how accurate time measurement affects our daily lives.
Graphical Representation-
Draw and label a distance-time graph for an object that is stationary for a while, then moves with uniform speed and stops again.
Non-Uniform and Uniform Motion – for Upper Primary School Students
Worksheet 3 – Motion and Time – Solved Worksheet with Answer
Explain in Detail-
(a) Uniform speed refers to the motion of an object when it covers equal distances in equal intervals of time, irrespective of the length of the intervals. For example, a car moving at a steady speed of 50 km/h on a highway.
(b) Periodic motion is a motion that repeats itself after regular intervals of time. Examples include the motion of a pendulum and the Earth’s revolution around the Sun.
Calculation and Understanding-
(a) Average speed = Total Distance / Total Time = 150 km / 3 hours = 50 km/h. This signifies that the train consistently covers 50 kilometres every hour.
(b) Frequency of the pendulum = 1 / Time Period = 1 / 2 seconds = 0.5 Hz. In one minute (60 seconds), it will complete 60 seconds * 0.5 Hz = 30 oscillations.
True or False with Justification-
(a) The odometer of a vehicle measures its speed. (False) – An odometer measures the distance travelled by a vehicle, not its speed.
(b) The distance-time graph for an object moving with uniform speed is a straight line. (True) – A straight line graph indicates that the object is covering equal distances in equal intervals of time, which is uniform speed.
Practical Application-
(a) To measure the time taken by a runner using a stopwatch, start the stopwatch as the runner begins the race and stop it when the runner crosses the finish line. The elapsed time on the stopwatch will be the time taken by the runner to complete the race.
Interpreting Graphs-
(a) A horizontal line in a distance-time graph indicates that the object is stationary – it is not changing its position over time.
(b) If the slope of a distance-time graph increases with time, it indicates that the object is accelerating – its speed is increasing over time.
Units and Measurement-
(a) The standard units for measuring speed are metres per second (m/s) or kilometres per hour (km/h), and the standard unit for time is the second (s).
(b) A speedometer in a vehicle measures the instant speed of the vehicle – the speed at that specific moment.
Conceptual Application-
(a) Knowing the average speed of a vehicle is important for planning long-distance travel, as it helps estimate the travel time and schedule breaks.
Comparing Types of Motion-
The motion of a pendulum (periodic motion) involves regular to and fro movement, whereas a fan’s blade (rotational motion) spins around a central axis.
Discussion Point-
Accurate time measurement is crucial in daily life for synchronising activities, maintaining schedules, and ensuring efficiency in tasks.
Graphical Representation-
For an object that starts from rest, moves with uniform speed, and stops again, the distance-time graph would start at the origin, rise linearly during movement, and then become horizontal when the object stops.
Worksheet 4 – Motion and Time – Student Worksheet (Unsolved)
Concept Understanding-
(a) Define ‘uniform speed’ and provide an example.
(b) What is meant by ‘periodic motion’? Give two examples from the .
Calculation-Based Questions-
(a) If a cyclist covers a distance of 40 kilometres in 2 hours, calculate their average speed.
(b) A pendulum completes one full oscillation in 4 seconds. How many oscillations will it complete in 2 minutes?
True or False (Provide justification)-
(a) The speedometer of a vehicle measures the distance travelled. (T/F)
(b) An object moving with non-uniform speed covers equal distances in equal time intervals. (T/F)
Application and Understanding-
(a) Describe how you can use a simple pendulum to measure a short time interval.
Graph Interpretation-
(a) Explain what a flat horizontal line on a distance-time graph indicates about an object’s motion.
(b) What can you infer about an object’s speed if the slope of its distance-time graph increases over time?
Practical Implications-
(a) Why is understanding the concept of speed important for a driver?
Comparative Analysis-
Compare the motion of a car travelling in a straight line to the motion of a child on a merry-go-round.
Critical Thinking-
Discuss the importance of accurate time measurement in daily activities.
Graphical Representation-
Draw and explain a distance-time graph for an object that starts from rest, moves with uniform speed, then accelerates, and finally comes to a stop.
Chapter 13- Motion and Time–Class 7 science- Question and Answer (Solved MCQs)
Worksheet 4 – Motion and Time – Solved Worksheet with Answer
Concept Understanding-
(a) Uniform speed is when an object covers equal distances in equal intervals of time. Example- A car travelling at a steady speed of 60 km/h on a highway.
(b) Periodic motion is a type of motion that repeats itself at regular time intervals. Examples include the swinging of a pendulum and the rotation of the Earth around the Sun.
Calculation-Based Questions-
(a) Average speed of the cyclist = Total Distance / Total Time = 40 km / 2 hours = 20 km/h.
(b) Frequency of the pendulum = 1 / Time Period = 1 / 4 seconds = 0.25 Hz. In 2 minutes (120 seconds), it will complete 120 seconds * 0.25 Hz = 30 oscillations.
True or False (Provide justification)-
(a) The speedometer of a vehicle measures the distance travelled. (False) – A speedometer measures the speed of the vehicle.
(b) An object moving with non-uniform speed covers equal distances in equal time intervals. (False) – Non-uniform speed implies that the distances covered in equal time intervals are not the same.
Application and Understanding-
(a) To measure a short time interval using a simple pendulum, you would first calculate the time period of one complete oscillation. Then, count the number of oscillations for the desired time interval.
Graph Interpretation-
(a) A flat horizontal line on a distance-time graph indicates that the object is stationary and not moving.
(b) An increasing slope on a distance-time graph suggests that the object’s speed is increasing over time.
Practical Implications-
(a) Understanding the concept of speed is crucial for drivers to maintain safe driving speeds and adhere to traffic laws.
Comparative Analysis-
The motion of a car travelling in a straight line is rectilinear motion, while the motion of a child on a merry-go-round is circular motion.
Critical Thinking-
Accurate time measurement is essential in daily activities for scheduling, planning, and coordination. It ensures the smooth functioning of various tasks and activities.
Graphical Representation-
Draw a distance-time graph- Start with a horizontal line (stationary), then a straight line with a positive slope (uniform speed), and finally another horizontal line (stops again).
Class 7 – Science- Chapter 13- Motion and Time- Question Answer (Long Question Answer)
Class 7 -Science- Chapter 13- Motion and Time Question Answer (Short Question Answer)
