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Moe, Larry, and Curly push on a 752-kg boat that floats next to a dock. They each exert an 80.5-N force parallel to the dock (Show all work)

a. What is the acceleration of the boat if they all push in the same direction? Give both direction and magnitude

b. What are the magnitude and direction of the boat’s acceleration if Larry and Curly push in the opposite direction to Moe’s push?