Uniform Circular Motion problem

AI Thread Summary
To determine the horsepower required for a motor to move a 150 lb person in a rolling chair at a speed of 1 m/s in a circle with a radius of 7 ft, the frictional force must be calculated using the coefficient of friction of 0.50. The work done against friction over time is crucial for finding the power needed. Power is defined as work done per unit time, and in this case, it can be expressed in horsepower. The discussion emphasizes the need to calculate the total force due to friction and the corresponding power output of the motor. Ultimately, understanding the relationship between work, power, and friction is essential for solving the problem.
Unknown2x
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there's a 150 lb person on a rolling chair and moves in a circle when a motor with a rope attached on it is hooked up to the chair.

If the radius of the circle is 7 ft, how much horsepower would the motor need to have to move the person at 1 m/s given that the friction coefficent is about 0.50.

Can someone give me an idea on how I can try to find how many horsepowers it would take? Thanks
 
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You are required to find horsePOWER (*hint hint*). What do you know about power?
 
oo power, i think that explains everything then. Just need to find how much work is being done to overcome friction over the time. thanks!
 

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