1q.2 it is simple harmonic
1.A body is suspended from a spring balance kept in a satellite,when orbit radius =R,reading = W1,when orbit = 2R,reading = W2
then
A)W1=W2
B)W1W2
ans:(a)
2.Suppose a tunnel is dug thru the centre of the earth , and a particle is dropped from a pt at height h from the surface of the earth.Is the motion simple harmonic?
Ans:No, Why?????
and is Torsional pendulum in the syllabus?
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5 Answers
1Answer 1 ---a
Clearly, as the radius of orbit increases, gravitational force reduces.
But at the same time the velocity to orbit also reduces, decreasing the centrifugal force.
So the net force on the object remains constant.
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33It is oscillatory motion not SHM.
Because for (R+h)>x>R force is constant. for small h or proportional to 1/h2 for large h.. so it is not SHM but oscillatory motion.