Question

solution

Answer 1

I don't get it. ;-;

Answer 2

Lol.

Answer 3

.

Answer 4

Suppose at this instant that the mass is going with a velocity \(v\) and the radius of its motion is \(r\).

In a very small time interval \(dt\), so small that we can approximate the motion as a straight line motion, the length of the string that wraps around the pole wouldn't be \(v dt\) right?