Physics

Problem

A rotating platform completes one full revolution in time

T

. a. (a) Derive an expression for the linear speed

v

of a point at a distance

r

from the centre in terms of

r

and

T

. b. (b) The platform has a radius of

4.0\,\text{m}

and takes

10\,\text{s}

to complete one revolution. Using your expression, calculate the linear speed of a child standing at the edge.