A monkey is sitting on a wood plate attached to a rope whose other end is passed over a tree branch, as shown in the figure. The monkey holds the rope and tries to pull it down. The combined mass of the monkey and the wood plate
a) What is the minimum force the monkey has to apply to lift-off the ground?
b) What applied force is needed to move the monkey with an upward acceleration of 2.45 m/s2?
c) Explain how the answers would change if a second monkey on the ground pulled on the rope instead.

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