The earth, moving around the sun in a circular orbit, is acted upon by a force and hence work must be done on earth by this force.

A body is acted upon by a force.State two conditions when the work done is zero.

Consider that the Earth is revolving around the Sun in a circular orbit with a period T. The area of the circular orbit is directly proportional to

Assertion(A) : The earth revolves around the sun an elliptical orbit Reasoning(R) : The sun alwaye attracts the earth with the same force

An earth satellite is moving around the earth in circular orbit. IN such case what is conserved

Earth completes one orbit around the sun is

Starting at rest , a 10kg object is acted upon by only one force as indicated in figure. Then the total work done by the force is :

Starting from rest a 10 kg object is acted upon by only one force as indicated in figure. Then the total work done by the force in 5 seconds is

A satellite X moves round the earth in a circular orbit of radius R . If another satellite Y of the same mass moves round the earth in a circular orbit of radius 4R , then the speed of X is ____________ times that of Y .

The earth moves around the Sun in an elliptical orbit as shown in Fig. The ratio OA//OB=x . The ratio of the speed of the earth at B to that at A is nearly

A satellite is moving around the earth with speed v in a circular orbit of radius r. IF the orbit radius is decreased by 1%, its speed will