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A 4 kg block is sliding at an initial speed of 10 m/s across a surface,...

A 4 kg block is sliding at an initial speed of 10 m/s across a surface, encountering a constant friction force of 9 N. How much work is done on the block after it slides 20 cm?

How fast is the block moving after sliding 20 cm?

What's the total distance the block travels before coming to rest?

What is the average power of friction on the block over the time it takes the block to come to rest?

What was the instantaneous power of friction on the block after it slid the first 20 cm?

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