A crate is given an initial push on a horizontal floor and is imparted with an initial velocity of 5.0 m/s. Because of kinetic friction, the crate slows down and comes to stop with constant deceleration over a time period of 1.1 seconds. The mass of the crate is 5.0kg. what is the magnitude of the friction force that causes the crate to come to a stop? what is the coefficient of kinetic friction? (Assume that friction is the only force slowing the crate)
PART 1:
Given that:
Initial speed, V = 5.0 m/s
Final speed, u = 0 m/s
Time taken to stop, t = 1.1 s
Therefore, deceleration (magnitude) of the crate:
Mass of crate, m = 5kg
Therefore Magnitude of friction force is given by:
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PART 2:
Friction force is given by:
Therefore, Coefficient of kinetic friction is given by:
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