1. A body starts from rest and travels for five seconds to make a displacement of 25 m if it has travelled the distance with uniform acceleration a then a is

2.  A body covers 16, 18, 20, 22 meters in 5th, 6th, 7th and 8th seconds respectively. Which of the following statements is true about the body?

3. Which of the following changes when a particle is moving with uniform velocity?

4. If the velocity-time graph of an object is a straight line sloping downwards, the body has

5. The acceleration of a moving object can be found from

6. What is the ratio of the average acceleration during the intervals OA and AB in the velocity-time graph as shown below?

7. A man leaves home for a cycle ride and comes back home after an half-an-hour ride covering a distance of one km. What is the average velocity of the ride?

8. A boy starts from a point A, travels to a point B at a distance of 3 km from A and returns to A. If he takes two hours to do so, his speed is

9. A body starts from rest and travels with uniform acceleration a to make a displacement of 6 m. If its velocity after making the displacement is 6 m/s, then its uniform acceleration a is

10. A bird flies with a speed of 10 km/hr and a car moves with uniform speed 8 km/hr. Both start from B to A at the same instant (BA = 40 km). The bird after reaching A flies back immediately to meet the approaching car. Once it reaches the car, it flies back to A. The bird repeats this until both the car and the bird reach A simultaneously. What is the total distance flown by the bird?

11. The displacement-time graph of a moving object is a straight line. Then,

12. If the displacement of an object is zero, then what can we say about its distance covered?

13. The displacement in metres of a body varies with time t in second as y = t² – t – 2. The displacement is zero for a positive of t equal to

14. A body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s. Then t is

15. What does the displacement of the particle shown in the graph indicate?

16. A bird flies with a speed of 10 km/hr and a car moves with uniform speed 8 km/hr. Both start from B to A at the same instant (BA = 40 km). The bird after reaching A flies back immediately to meet the approaching car. Once it reaches the car, it flies back to A. The bird repeats this until both the car and the bird reach A simultaneously. What is the total distance flown by the bird?

17. An athlete finishes a round of circular track of radius R in 40 sec. What is his displacement at the end of 2 min 20 sec?

18. Which of the following remains constant if a body travels with constant acceleration?

19. Which one of the following is the unit of velocity?

20. Elephants A, B and C move with a constant speed in the same direction along a straight line as shown in the figure. The speed of the elephant A is 5 m/s and the speed of the elephant C is 10 m/s. Initially, the separation between A and B is d and between B and C is also d. When B catches C, the separation between A and C becomes 3d. What will the speed of B be?