A boy pushes a 500kg box along a floor with a f... - JAMB Physics 2019 Question
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
B
A. 0.8
C
0.65
D
0.4
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Correct Option: D
m = 500kg,
W = mg = 500 × 10 = 5000N
F = 2000N
| μ = | Force at constant velocity
weight | = | 2000
5000 | = 0.4 |
μ 0.4
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