An 8.0-kg block is released from rest, 1 = 0 m/s, on a rough incline. The block moves a distance of 1.6-m down the incline, in a time interval of 0.80 s, and acquires a velocity of 2 = 4.0 m/s.
In Fig. 6.3, the average rate at which the block gains kinetic energy during the 0.80 s time interval is closest to:
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