11. A 2,000 kg truck travelling at 10 m/s collides with a car parked at a traffic light. After the collision, both move together at a speed of 8m/s. Mass of car is . . . . . . . .
12. 1 horse power is equal to approximately . . . . . . . . watts.
13. What is the kinetic energy of an object of mass 15 kg moving at the velocity of 8ms-1?
14. When a continuous force acts on an object of 8 kg mass for 2 seconds, it increases the velocity of the object from 4 ms-1 to 9 ms-1. What is the magnitude of the applied force?
15. The momentum of an object depends on . . . . . . . .
16. What would be the energy contained at a height of 6m by a body of mass 50kg?
17. What is the form of energy that is not generated when riding a bicycle?
18. Measurement of mass of an object is called measurement of
19. Which of these can neither be created nor destroyed?
20. A boy of 50 kg mass climbs 40 stairs in 9 seconds. If the height of each stair is 15cm, then find his power. (g = 10ms-2)
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