CBSE Class 7 Science Motion and Time Worksheet with Solution by Expert Science Mam. Students of 7th Grade can solve this worksheet for extra preparation before exam. Private Teacher or Guardians of the Students can copy all the questions of this chapter and will match after solve their students.
Motion and Time Class 7 Worksheet
Worksheet for Chapter No.13): – Motion and Time
The following questions are important for your exams for 1 mark 2 mark or 5 marks. First solve the questions on your own and then saw the solution for understanding it better.
Practice worksheet for class 7
Section A
Q.1.) Define motion and write the SI unit of speed?
→ The change in position of a body with time is called as motion. The SI unit of speed is meter per second.
Q.2.) What do you mean by speed and what is the speed of jeep that covers 140 km in 2 hours?
→ 1.) Speed is the distance covered by a body in unit time.
2.) The speed of the Jeep is 70 km per hour.
Q.3.) What is the function of odometer and define it ?
→ Odometer is a device that records total distance covered by the vehicle It is used to calculate the distance traveled in a particular journey.
Q.4.) The distance between two stations is 280 km and a train 7 hours to cover the distance calculate the speed of the train?
→ Given:- distance between two stations = 280 km
Time taken to cover the distance = 7 hrs.
Therefore speed = distance / time
= 280/7
= 40km/hr.
Q.5.) What is the unit of time and speed ?
→ The unit of time is a second and its symbol is ( s) while the unit of speed is meter per second and it’s symbol is ( m/s ).
Q.6.) Define the following terms?
→ 1.) Motion – motion is a change in position of an object with respect to time.
2.) Oscillatory motion – the to and for motion of an object is called oscillatory motion.
3.) Circular motion – circular motion is rotation of an object along the circular path.
Q.7.) How time can be measured before the pendulum clocks are available for measuring the time ?
→ The time can be measured with the help of sundials, water clocks and sand clocks.
Q.8.) What do you mean by quartz clock?
→ Clocks and watches have an electric circuit with one or more cells and these clocks called as quartz clocks. The time measured by quartz clocks is very accurate than other clocks available before the quartz clock.
Q.9.) What is the definition of distance and give its units?
1.) Distance is a total path covered by the object in each intervals of time.
2.) Distance = speed× time
3.) Unit of distance is generally major in units of length meters and kilometers etc.
Q.10.) When will be the object is said to be at rest ? Give example?
→ An object is a said to be at rest if the object does not change its position with time example- a person standing on the ground.
Q.11.) What are the types of motion?
→ Generally, there are three types of motion.
1.) Rectilinear motion
2.) Circular motion
3.) Oscillatory motion
Q.12.) What is the meaning of oscillatory motion give one example?
→ Oscillatory motion is the motion in which a body repeats its motion after fixed intervals of time.
E.g. – the motion of planets around the sun.
Q.13.) What is rectilinear motion?
→ It is a type of linear motion in which the direction of the velocity remains constant and the path is a straight line.
Q.14.) What is average speed?
→ Average speed is the total distance that something has traveled divided by the total amount of time taken to travel the distance.
Q.15.) Name the following motion?
1.) Motion of a pendulum of a clock – oscillatory motion
2.) The motion of a girl sitting on a see-saw in a park. – oscillatory motion.
3.) Motion of a boy in a merry go round.- circular motion
4.) Motion of a train on a railway track.- rectilinear motion
5.) Motion of moon around the sun.- circular motion.
Q.16.) A simple pendulum takes 52 seconds to complete 20 oscillations What is the time period taken by the pendulum?
→ Given:- number of oscillations = 20
Total time taken to complete 20 oscillations = 52 sec.
Time period = total time taken / number of oscillations.
= 52/20
= 2.6 s
Q.17.) With the help of following given quantities, complete the following table?
SR.NO. | Distance covered by object (km) | Time taken by object(hr.) | Speed of object |
1 | 120 | 6 | —– |
2 | 240 | 6 | —– |
3 | 360 | 6 | —– |
4 | 720 | 9 | —– |
5 | 320 | 8 | —– |
SR.NO. |
Distance covered by object (km) | Time taken by object(hr.) | Speed of object |
1 | 120 | 6 |
20 km/hr. |
2 |
240 | 6 | 40 km/hr. |
3 | 360 | 6 |
60 km/hr. |
4 |
720 | 9 | 80 km/hr. |
5 | 320 | 8 |
40 km/hr. |