41. An object of mass 12kg is placed at a certain height from the ground. If the potential energy of the object is 480J, find the height from the ground of an object?
42. An object of mass 11kg is moving at a velocity of 5m/s. How much the energy is contained in that object?
43. The commercial unit of energy is?
44. . . . . . . . . is known as the strength of an object.
45. The kinetic energy of a light and a heavy body is the same. Which of the following will have greater momentum?
46. The potential energy of an object increases with its-
47. The momentum of a body is 50 Kg.ms-1 and the velocity is 5ms-1. What is the mass of that body?
48. If an aeroplane travelled 4000m distance and work done is 20000J. Then force applied on it is
49. When a compressed slinky (spring) is released, it changes the potential energy into?
50. Which one of the following does not convert electrical energy into light energy?
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