A 100kg box is pushed along a road with force of 500N. If the box moves with a uniform velocity, the coefficient of friction between the box and the road is
-
A.
0.4 -
B.
1.0 -
C.
0.8 -
D.
0.5
Correct Answer: Option D
Explanation
Coefficient of friction μ = F/R = F/mg = 500/1000 = 0.5
∴ μ = 0.5