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A 4.4 kg block 2.7 m off the ground sits at the top of the ramp....

A 4.4 kg block 2.7 m off the ground sits at the top of the ramp. It is held and let go at the top of the ramp until it reaches the bottom where it is travelling 5.0 m/s. What is the power of friction on the block if it took the block 2.8 s to make it to the bottom of the ramp?

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