An Earth satellite is in a circular orbit at an altitude of 500 km explain why w

Question

An Earth satellite is in a circular orbit at an altitude of 500 km explain why work by the gravitational force acting on the satellite is zero using work energy theorom what can you say about the speed of the satellite An Earth satellite is in a circular orbit at an altitude of 500 km explain why work by the gravitational force acting on the satellite is zero using work energy theorom what can you say about the speed of the satellite An Earth satellite is in a circular orbit at an altitude of 500 km explain why work by the gravitational force acting on the satellite is zero using work energy theorom what can you say about the speed of the satellite

Explanation / Answer

Gravitationa force will act toward Earth on the satallite while satellite is moving in circular orbit i.e. at 90 degree to force directionso work done=force*displacement*cos(theta)

here theta=90 so work done =0 J

(b) for circular motion

GM*m/r^2=mv^2/r

we got

v=sqrt(GM/r)=7781.72 m/s

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