A body of mass 100g moving with a velocity of 10ms-1 collides with a wall. If after collision it moves with a velocity of 2.0ms−1 in the opposite direction, calculate the change in momentum.
A 20kg mass is to be pulled up a slope inclined at 30° to the horizontal. If efficiency of the plane is 75%. The force required to pull the load up the plane is J [g=10ms\(^{− 2}\)]
The tendency of a body to remain at rest when a force is applied to it is called.
An object is placed 20cm from a concave mirror of focal length 10cm. The linear magnification of the image produced is?
The energy needed to move a unit positive charge around a complete electric circuit is called the
