A block of mass m1 = 1.5 kg is placed on a horizontal surface. Attached to the block is a string which passes over a pulley and suspends a mass m2 = 3.5 kg.
If the system moves with a constant velocity, what is the coefficient of kinetic friction k between the horizontal surface and m1?
Kinetic friction??
2016-06-20 6:12 am
回答 (2)
2016-06-20 6:52 am
✔ 最佳答案
Consider the two blocks as a whole system.As the system moves with a constant velocity, resultant force = 0
Frictional forces acting on the block m₁ = Gravitational forces acting on the block of m₂
m₁ g × μ(k) = m₂ g
μ = m₂ / m₁
Coefficient of kinetic friction, μ(k)
= 3.5/1.5
= 2.3
2016-06-20 6:17 am
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