A box is being pulled is being pulled by a force at an angle of 30 degrees with
ID: 1346140 • Letter: A
Question
A box is being pulled is being pulled by a force at an angle of 30 degrees with respect to the horizontal plane. The box weighs 10 N. The magnitude of the pulling force is 50 N. If the box is being pulled with constant velocity, calculate Fx, N, coefficient of kinetic friction. A box is being pulled is being pulled by a force at an angle of 30 degrees with respect to the horizontal plane. The box weighs 10 N. The magnitude of the pulling force is 50 N. If the box is being pulled with constant velocity, calculate Fx, N, coefficient of kinetic friction.Explanation / Answer
In vertical direction,
N - mg + Fsin30 = 0
N = mg - Fsin30 = 100 - (50sin30) = 75 N
As box is moving with constant velocioty so a = 0
in horizontal direction,
Fcos30 - f = 0
50cos30 - uk(75) = 0
uk = (50 cos30) / 75 = 0.577
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