The figure shows a block of mass m = 20 kg on a ramp with an angle of 30 degree.

Question

The figure shows a block of mass m = 20 kg on a ramp with an angle of 30 degree. The spring constant is 500 N/m. Use 2 sig figs for all answers. Initially treat the surface as frictionless. You are holding the free end of the spring stationary. Draw a free body diagram for the block. How far does the spring stretch while it is at rest? You pull so the block is accelerating at 4 m/s^2 up the ramp. How far does the spring stretch? Now you are on a ramp with the following coefficients of friction: mu_s = 0.3 and mu_k = 0.2. You are initially holding the free end of the spring. You pull the spring so the block is accelerating at 4 m/s up the ramp. Draw a free body diagram. How far is the spring stretched in the above situation?

Explanation / Answer

The figure shows a block of mass m = 20 kg on a ramp with an angle of 30 degree.

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