Class-7 Science – 9 Motion and Time

 

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Select type of motion

#1. Soldiers in a march past

#2. Bullock cart moving on a straight road

#3. Hands of an athlete in a race

#4. Pedal of a bicycle in motion

#5. Motion of the Earth around the Sun

#6. Motion of a swing

#7. Motion of a pendulum

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#8. Distance covered by an object in a unit time is called ______ of the object

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#9. Total distance covered / Total time taken = …….

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#10. When, Average speed = Actual speed

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#11. Simple pendulum is the example of ………. motion.

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#12. The time taken by the pendulum to complete one oscillation is called its …………..

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#13. Which clock is more accurate?

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#14. The basic unit of time is a ……..

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#15. Basic unit of …….. is meter/second.

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#16. The symbols of all units are written in …….

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#17. Which is right ?

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#18. A pendulum of a given length takes always the ……. time to complete one oscillation.

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#19. The time taken in saying aloud “two thousand and one” is nearby …….

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#20. Relation between D-distance, T-time, S-speed

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#21. ………….. measures the distance moved by the vehicle.

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#22. ……….. shows speed of vehicle.

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#23. A cyclist riding on a hilly path, where the speed changes due to the incline

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#24. A train moving at a constant speed without acceleration or deceleration

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#25. ……. of objects help us to decide which one is moving faster than the other.

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#26. Periodic events are used for the measurement of …….

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#27. The distance-time graph for the motion of an object moving with a constant speed is a ………

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#28. Motion of a child in a merry-go-round

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#29. Motion of a child on a see-saw

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#30. Motion of the hammer of an electric bell

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#31. A simple pendulum takes 32 s to complete 20 oscillations. What is the time period of the pendulum

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#32. The distance between two stations is 240 km. A train takes 4 hours to cover this distance. Calculate the speed of the train

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#33. The odometer of a car reads 57321.0 km when the clock shows the time 08:30 AM. What is the distance moved by the car, if at 08:50 AM, the odometer reading has changed to 57336.0 km? Calculate the speed of the car in km/min during this time.

#34. Express the speed in km/h also. The speed of the car is …….. km/h.

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#35. Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and the school

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Show the shape of the distance-time graph for the motion in the following cases in notebook : (i) A car moving with a constant speed. (ii) A car parked on a side road

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#36. The basic unit of speed is

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#37. A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes. The total distance covered by the car is

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#38. Fig. shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster?

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#39. Which of the following distance-time graphs shows a truck moving with speed which is not constant?

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