The motor exerts a force F on the 41-kg crate as shown in the graph. When t = 0, the crate is moving downward at 10 m/s. (Figure 1)

Part A 

Determine the velocity of the crate when t = 3 s.

Express your answer to three significant figures and include the appropriate units. Enter positive value if the velocity is directed upward and negative value if the velocity is directed downward.

Part B 

Determine the velocity of the crate when t = 6 s.

Express your answer to three significant figures and include the appropriate units. Enter positive value ifa the velocity is directed upward and negative value if the velocity is directed downward.

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