4Ans given is A
The earth's gravity provides the centripetal force on a orbiting satellite to keep it moving in circle at constant speed . Which statements best explains why the speed of the satellite does not change even though there is a net force exerted on it?
(A) The satellite is in equillibrium with respect to ground
(B) The accelaration of the satellite is zero with respect to ground
(C) The centripetal force has magnitude mv2 / r & it's balanced by a centrifugal force as seen from the earth
(D) The centripetal force is always perpendicular to the velocity
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3 Answers
1Thereare a few questions that i would like to ask.
1st : wht is the source ?
2nd: how is a net force acting?
3rd: if it's in equilibrium w.r.t ground...then no net force should act on it which does not match the criteria of question.
41st : Source is Arihant
2nd : Net force acting is force of attraction by Earth(I guess)
3rd : it's in equillibrium w.r.t ground (not earth) which is also rotating & experiencing earth's gravitation