11. A porter lifts 500 N up to a distance of 100 meters work done by the porter is-
12. A person is sitting in a car which is at rest. The reaction from the road at each of the four wheels of the car is R. When the car runs on a straight level road, how will the reaction at either of the front wheels vary?
13. An object with 200 g mass will have momentum with its 10 J kinetic energy-
14. Mass × acceleration = ?
15. The energy stored in a watch spring is
16. If an object of mass m is raised to height h from the ground, force is required for this action. The minimum force required to lift an object is the same as . . . . . . . .
17. Assertion (A) A spring has potential energy, both when it is compressed or stretched.
Reason (R) In compressing or stretching, work is done on the spring against the restoring force.
Reason (R) In compressing or stretching, work is done on the spring against the restoring force.
18. An object of 13kg mass is moving with constant speed of 5m/s, what will be kinetic energy contained in the object?
19. An object of mass 20 kg is moving with an uniform velocity of 5 ms-1. What is the kinetic energy possessed by it?
20. A constant force acts on an object of mass 5 kg for a period of 2 seconds. This increases the velocity of the object from 6 ms-1 to 8 ms-1. Find the amount of force applied.
Read More Section(Work, Energy and Power)
Each Section contains maximum 100 MCQs question on Work, Energy and Power. To get more questions visit other sections.