Physics Past Questions and Answers

What is the frquency of vibration if the balance wheel of a wrist watch makes 90 revolutions in 25 s?

If a body mass 5kg is thrown vertically upwards with velocity u,at what height will the potential energy equal to the kinetic energy?

counting of currency notes with moist fingers is based on the principles of?

A motorcycle of mass 100kg moves round in a circle of radius 10m with a velocity of 5 ms^-1. find the coefficient of friction between the road and the tyres.

A spring of force constant 500 NM^-1 is compressed such that its length shortens by 5cm. The energy stored in the spring is?