A 60 k g body is pushed with just enough force to start it moving across a floor and the same force continues to act afterwards. The coefficient of static friction and sliding friction are 0.5 and 0.4 respectively. The acceleration of the body is

Question

A 60 k g body is pushed with just enough force to start it moving across a floor and the same force continues to act afterwards. The coefficient of static friction and sliding friction are 0.5 and 0.4 respectively. The acceleration of the body is, 6 m s - 2, 4 . 9 m s - 2, 3 . 92 m s - 2, 1 m s - 2

MARKS App · Accepted Answer

Force required to just start the motion is, f L = μ s m g Once body starts sliding friction becomes kinetic, ∴ a = f L - f k m = μ s m g - μ k m g m a = μ s - μ k g = 0.5 - 0.4 10 m s - 2 a = 1 m s - 2

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