the position of a 280-g object is given (in meters) by x =5.0t 3 – 8.0t 2 – 44t, where t is in seconds

the position of a 280-g object is given (in meters) by x =5.0t 3 – 8.0t 2 – 44t, where t is in seconds.determine the net rate of work done on this object (a) at t = 2.0 sand (b) at t = 4.0s. (c) what is the average net power output during the interval from t = 0s to t = 2.0s, and in the interval from t =2.0s to 4.0s?
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