Question

A person is making homemade ice cream. She exerts a force of magnitude 28 N on the free end of the crank handle on the ice-cream maker, and this end moves on a circular path of radius 0.27 m. The force is always applied parallel to the motion of the handle. If the handle is turned once every 1.1 s, what is the average power being expended?

Answer 1

Answer:

$P = 43.2 Watt$

Explanation:

As we know that the handle is moving with uniform speed

so we can find the speed as

$v = \frac{2\pi R}{T}$

now we have

$R = 0.27 m$

T = 1.1s

now we have

$v = \frac{2\pi (0.27)}{1.1}$

$v = 1.54 m/s$

now we know that power is given as

$P = F.v$

F = 28 N

$P = 28(1.54)$

$P = 43.2 Watt$