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
Verified Correct Answer: D.
Physical Principles & Numerical Solution
Coefficient of friction μ = F/R = F/mg = 500/1000 = 0.5
∴ μ = 0.5
Source: Myschool Past Questions Archive (Record #12894)