Show your work wherever possible. Record all answers with THREE DIGITS. O PROBLEMS 1 In the diagram shown, each barrel has a mass of 15.2kg. The angle 0 = 145°. a. Draw a free body diagram for a system that includes only the lower barrel. b. Draw a free body diagram for a system that includes only the upper barrel. c. Draw a free body diagram for a system that includes both barrels. d. Determine the magnitude of the force that force that the bottom barrel exerts on the top barrel. (Hint: which free body diagram above is the easiest to use to determine this?) e. Determine the magnitude of the force that the ground exerts on the bottom barrel. (Hint: which free body diagram above is the easiest to use to determine this?)

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”