(a) Draw a separate free-body diagram for each block. (b) Find the acceleration
ID: 2231703 • Letter: #
Question
(a) Draw a separate free-body diagram for each block.
(b) Find the acceleration of the blocks
(c) Find the resultant force on each block.
(d) Find the magnitudes of the contact forces between the blocks.
(e) You are working on a construction project. A coworker is nailing up plasterboard on one side of a light partition, and you are on the opposite side, providing "backing" by leaning against the wall with your back pushing on it. Every hammer blow makes your back sting. The supervisor helps you put a heavy block of wood between the wall and your back. Using the situation analyzed in parts (a) through (d) as a model, explain how this change works to make your job more comfortable.
I solved everything, and I only need help on part e.
Explanation / Answer
a = 20.5 / (2+3+5.35) = 1.98 m/s^2 on m3 F23 = contact force between 2 and 3 F23 = 5.35*1.98 =10.593 N towards right side on m2 F12 - F32 = 3*1.98 F12 = 16.533 N towards right side and F32 towards left side magntiude = F23 on m1 F - F21 = 2*1.98 and F21 is towards left side
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