To annoy his son-in-law Roger, Mason takes a block with a mass of 2.00kg and places it on a smooth horizontal surface compressing a spring 0.285m from its equilibrium position. The block is released from rest and slides across the horizontal surface and travels 2.50m up an incline with a coefficient of kinetic friction of 0.300 that makes an angle of 40.0° with respect to the horizontal. If the block has a velocity of 1.25m/s when it has traveled the 2.50m up the incline to press a button on a Mr. William’s box. What would the stiffness of the spring need to be in Newtons per meter?

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Q: Thanks!!

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Q: Thanks!

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.