21. If two forces of 10 N and 5 N are applied in the same direction on an object, what will be the total force acting on the object?
22. Find the potential energy of an object mass m raised from the ground level at a height of 4h-
23. If an object of 10kg mass is moving at a speed of 2m/s, then kinetic energy of the object is-
24. A man raised 20kg object from the surface of earth and put the object 2m above on his head. Calculate the work done by the man is- (g = 10 m/s2)
25. If both the mass and the velocity of a body is increased to twice of their magnitude, the kinetic energy will increase by
26. Which of the following position is no work done?
27. What is the amount of work done when an object moves under a force of 10 N at a distance of 10 m in the direction of force?
28. 10 N force is working on an object. Object displaced 5m in the direction of applied force, then work done is-
29. A worker raise 10kg object from the ground and put 1.2m above on his head then work done is- (g = 10 ms-2)
30. A bus runs with a force of 4000 N. The work done by the bus is 2000 J. What is the distance covered by the bus?
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