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sashaice [31]
3 years ago
12

During an experiment, an object is placed on a disk that rotates about an axle through its center, as shown in Figure 1. The dis

k is a distance R =0.10 m from the center and rotates with a constant tangential speed of 0.60 ms. A free body diagram of the forces exerted on the block is shown in Figure 2 with an unknown force of friction. What is the force of friction exerted on the object?
A. 0.50 N

B. 0.72 N

C. 5.0 N

D. 7.2N
Physics
1 answer:
Step2247 [10]3 years ago
8 0

Answer:

B. 0.72 N

Explanation:

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Work done is given by the potential energy of the water as:

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(b) Work done to pump all the water through an outlet of 2 m:

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Work done,W = m_{w}gh = 3.215\times 9.8\times 4.75 = 149.65\ J

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