Question

what is work done by the force of gravity on a satellite moving round the earth? justify your answer

Answer 1

The work done will be 0
Because at any point the direction of the force will be a tangent to the satellite I.e. 90 and cos 90 = 0 there for work done will be f*s*cos theta
Theta is 0 therefore work is 0

Answer 2

❤❤❤☆$\red {HELLO\:DEAR}$☆❤❤❤

❤❤❤Work is done whenever the given two conditions are satisfied:

❤❤❤

❤❤❤ (i) A force acts on the body.❤❤❤

❤❤❤(ii) There is a displacement of the body by the application of force in or opposite to the direction of force.❤❤❤

❤❤❤If the direction of force is perpendicular to displacement, then the work done is zero.❤❤❤

❤❤❤When a satellite moves around the Earth, then the direction of force of gravity on the satellite is perpendicular to its displacement.❤❤❤

❤❤❤Hence, the work done on the satellite by the Earth is zero.❤❤❤

❤❤❤☆$\green {VISHU\:PANDAT}$☆❤❤❤

❤❤❤ ☆$\blue {FOLLOW\:ME}$☆❤❤❤