Answered

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A 4.5 kg box is being pulled by a girl using a string that makes an angle of 20° horizontal. Find the force of friction if the force exerted on the string is 15 N and the coefficient of friction is 0.5.

Sagot :

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Answer:

Fcoso-f =ma. F= ma 15 = 4.5 a then get acceleration. Fcoso- umg = ma then get friction

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