A crate on a motorized cart starts from rest and moves with a constant eastward acceleration of

Question:

A crate on a motorized cart starts from rest and moves with a constant eastward acceleration of a = 2.80 m/s². A worker assists the cart by pushing on the crate with a force that is eastward and has magnitude that depends on time according to F(t) = 15.40 N/s²t. What is the instantaneous power supplied by this force at t = 5.00 s?

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