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9 Nov 2019

A spring, which has a spring constant of 1200 N/m, is compressedx = 0.20 m from its equilibrium position with a 5.0 kg block andreleased at point A. The block travels to the right along africtionless track and then up a 15° ramp to a horizontal platformat a height h = 0.30 m above the base.

Please show all work! I have a final coming up! And explaineverything please. Thanks.


a. What is the block’s velocity at point B?

b. The frictionless ramp is replaced with one that has a roughsurface with a kinetic
coefficient of friction of 0.30. The horizontal surfaces are stillfrictionless. How much
work is done on the block by the frictional force as the blockslides up the ramp to the
platform?

c. With the rough ramp, what is the smallest value of the springcompression that will just get the block onto the platform?

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