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A person is making homemade ice cream. She exerts a force of magnitude 29 N on the free end of the crank handle on the ice-cream maker, and this end moves on a circular path of radius 0.30 m. The force is always applied parallel to the motion of the handle. If the handle is turned once every 1.5 s, what is the average power being expended

Respuesta :

Answer:

P = 36.44 W.

Explanation:

given,

force = 29 N

Radius of circular path, R = 0.30 m

time = 1.5 s

Average Power, P = ?

Work done = F .s

displacement, s = 2 π r

         s = 2 π x 0.30 = 0.6 π

W = F .s

W = 29 x 0.6 x π

W = 54.66 J

now,

[tex]Power = \dfrac{Work\ done}{time}[/tex]

[tex]Power = \dfrac{54.66}{1.5}[/tex]

   P = 36.44 W.

The average power of the Person is equal to 36.44 W.

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