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  3. 3) a 2 kg block is sliding at an initial speed of

3) A 2 kg block is sliding at an initial speed of 10 m/s across a...

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Question

Physics

3) A 2 kg block is sliding at an initial speed of 10 m/s acrossa surface, encountering a constant friction force of 7 N. How muchwork is done on the block after it slides 22 cm?

Answer:  

Hint: Does the block gain or lose energy duringthis process? What sign does this imply for the work done onit?

4) How fast is the block moving after sliding 22 cm?

Answer:  

Hint: You can treat the block like a simpleparticle. What kind of energy does it have and how is this affectedby the work done on it?

5) What's the total distance the block travels before coming torest?

Correct, computer gets: 14.29 m

6) What is the average power of friction on the block over the timeit takes the block to come to rest?

Answer:  


7) What was the instantaneous power of friction on the block afterit slid the first 22 cm?

Answer

Answer & Explanation Solved by verified expert
4.1 Ratings (717 Votes)
3 Work done on the block Ff x distance Where Ff is the frictional force 7 x 022 154 J 4 Initial velocity u 10 ms Consider v as the final    See Answer
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