A block of mass 5kg is pushed along a horizontal surface with a force of 60N as shown in the figure below. The acceleration of the block is 3.2m/s². What is the coefficient of friction between the block and the horizontal surface?
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A block of mass 5kg is pushed along a horizontal surface with a force of 60N as shown in the figure below. The acceleration of the block is 3.2m/s². What is the coefficient of friction between the block and the horizontal surface?
Solution :
M = ?
F = 60 N
u = 32 m/sec²
m = 5 kg
Fr = m(mg+FSin45)
= (60/5×10+60×1/√2) = ú
m = 60/50+30√2
m = 0.71
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