A farmer is using a rope and pulley to lift a bucket of water from the bottom of a well. the farmer uses a force f1=57.5 n to pull the bucket of water upwards. the total mass of the bucket of water is f2 = 3.9kg.

-Calculate how much work Wg in J gravity does on the bucket filled with water as the farmer lifts it up the well.

-Calculate the net work Wnet in J done on the bucket of water by the two forces F1 and Fg.

Question

Physics

Lyons

3 October, 12:09

A farmer is using a rope and pulley to lift a bucket of water from the bottom of a well. the farmer uses a force f1=57.5 n to pull the bucket of water upwards. the total mass of the bucket of water is f2 = 3.9kg.

-Calculate how much work Wg in J gravity does on the bucket filled with water as the farmer lifts it up the well.

-Calculate the net work Wnet in J done on the bucket of water by the two forces F1 and Fg.

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Answers (1)

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Teagan Morris · Answer 1

The first problem cannot be solve because you did give the distance or length of the rope, because work = distance x force. i can only solve the the second problem. since the bucket is moving up then force due to gravity is going down, then the net force is:

Fnet = F1 - Fg

where Fg = mg

g is the accelaration due to gravity (9.81 m/s^2)

Fnet = 57.5 N - (3.9 kg) (9.81) N

Fnet = 19.24 N