- #1
hollymason
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Homework Statement
Two blocks are pushed to the right so that they move together with increasing speed. Block B remains at the height shown. Ignore friction between the ground and block A but not between block A and block B. The mass of block A is 10kg and the mass of block B is 2kg. Let system S represent the system consisting of both blocks A and B. (use g=10m/s^2)A-for block a, b, and system s: draw free-body diagrams, identify any Newton's third law force pairs, and write out the algebraic form of Newton's second law.
B-using only the forces in your free-body diagram for system S, calculate the magnitude of the force exerted on system C by the ground (N_sg).
C-using only the forces in your free-body diagrams for block A and block B, calculate the magnitude of the force exerted on block A by the ground (N_ag).
D- How should the value of N_sg compare to N_ag?
Homework Equations
Force = mass X acceleration
The Attempt at a Solution
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This is my attempt so far. I'm stuck on C because I feel like I would use the same equation F=m X a but mass would be 10kg instead of 12 because it's asking about the force exerted on A. But the blocks move together so would I account for the weight of B as well? I've attached an image so you can see my attempt at parts A and B as well.
http://oi58.tinypic.com/2z4gw11.jpg