41. What does the slope of velocity-time graph represent?
42. The following figure represents the velocity-time graph of a moving car on a road.
Which segment of the graph represents the retardation?
Which segment of the graph represents the retardation?
43. When a body is moving on a surface, the force of friction is called
44. Which scientist gave 'Laws of motion'?
45. A stone tied to a string is whirled in a circular path. As it was revolving, the rope suddenly snaps. Then
46. The equation F = ma, is given by Newton's . . . . . . . . law of motion:
47. Why does a cannon recoil after firing?
48. The second law of motion shows-
49. A ball P is dropped vertically and another ball Q is thrown horizontally with the same velocities from the same height and at the same time. If air resistance is neglected, then
50. Which one of the following is not a contact force?
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