First slide

Motion of planets and satellites

Question

If satellite is shifted towards the earth. Then time period of satellite will be

Easy

A

Increase
B

Decrease
C

Unchanged
D

Nothing can be said

Solution

$T^{2} \propto r^{3} \Rightarrow T \propto r^{\frac{3}{2}} A s r a d i u s o f t h e o r b i t d e c r e a s e s, T i m e p e r i o d o f t h e s a t e l l i t e a l s o d e c r e a s e s a n d i t s v e l o c i t y i n c r e a s e s$

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