when a body is moving in a circular orbit work done will be???
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When a body is movind in a circular orbit, ZERO work is done.....
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Zero
Work Done by a body moving in a circular path is Zero . ( Provided it is a uniform circular motion).
This is so because, the Centripetal force on the body at any instant , is directed towards the centre of the circular path and the direction of displacement at that instant is along the tangent drawn to the circular path i.e. normal to the direction of force on the body.
Like this-
Numerically-
Work Done = F*S*Cos θ
θ = 90°
Cos 90°= 0
Hence, Work Done= 0
There is also a case that when a body completes one round while moving in a circular path , the displacement becomes zero and hence, work done also becomes zero.
Zero
Work Done by a body moving in a circular path is Zero . ( Provided it is a uniform circular motion).
This is so because, the Centripetal force on the body at any instant , is directed towards the centre of the circular path and the direction of displacement at that instant is along the tangent drawn to the circular path i.e. normal to the direction of force on the body.
Like this-
Numerically-
Work Done = F*S*Cos θ
θ = 90°
Cos 90°= 0
Hence, Work Done= 0
There is also a case that when a body completes one round while moving in a circular path , the displacement becomes zero and hence, work done also becomes zero.
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