# Circular Motion

## moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R, the ratio of displacement to the covered path will be

A.??R B.2??R C.zero D.4??R

## Centripetal force performs

A.maximum work B.minimum work C.negative work D.no work

## A man of weight W is standing on an elevator which is ascending with an acceleration a. The apparent weight of the man is

A.mg B.mg – ma C.mg + ma D.mg – ma

## When a body moves in a circle of radius r with linear speed V its centripetal force is

A.mV/r2 B.mV/r C.mV2/r D.mV2/r2

## Who discovered the inverse square law for gravity?

A.Einstein B.Galileo C.Newtons D.Plank

## A stone is whirled in a vertical circle at the end of a string. When the stone is at the highest position the tension in the string is

A.maximum B.zero C.equal to the weight of the stone D.less than the weight of the stone

## The span of broad jump depends upon

A.mass of the jumper B.height of jump C.angle of projection D.none

A.4 B.3 C.2 D.5