A boy pushes a 500kg box along a floor with a force of 2000N. If the velocity of the box is uniform, the co-efficient of friction between the box and the floor is
-
A.
1 -
A.
0.8 -
C.
0.65 -
D.
0.4
Correct Answer: Option D
Explanation
m = 500kg, W = mg = 500 × 10 = 5000N
F = 2000N
| μ | = | Force at constant velocity
weight |
= | 2000
5000 |
= | 0.4 |
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