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
- 1
- 0.8
- 0.65
-
0.4
The correct answer is: D
Explanation
m = 500kg, W = mg = 500 Ć 10 = 5000N
F = 2000N
| Ī¼ | = | Force at constant velocity
weight |
= | 2000
5000 |
= | 0.4 |
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