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Which of the following is true for a satellite
in a circular orbit
a) it is a freely falling body
b) its speed is constant
c) it suffers no acceleration
d) it does not require energy for motion in the orbit

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a,b,c and d

a, b and c

a, b and d

a and b

answer is B.

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Detailed Solution

Only force acting on a satellite is the gravitational force of attraction of earth.So it is a freely falling body.

Since the force on the body is radially inward and its velocity is tangential , gravitational force does no work on the satellite .So no energy is supplied to the satellite for its motion.Hence option - (2) is right.

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