A 12-Kg Crate Rests on a Horizontal Surface and a Boy

question 37

Multiple Choice

A 12-kg crate rests on a horizontal surface and a boy pulls on it with a force that is 30° below the horizontal.If the coefficient of static friction is 0.40, the minimum magnitude force he needs to start the crate moving is:

• A)44 N
• B)47 N
• C)54 N
• D)56 N
• E)71 N

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