Problem 4 In the Figure below, a 2.5 kg block slides head on into a spring with a spring constant of 320 N/m. When the block stops it has compressed the spring by 7.5 cm. The coefficient o kinetic friction between the block and the horizontal surface is 0.25. While the block is in contact with the spring and being brought to rest, what are (a) the work done by the spring force, and (b) the increase in thermal energy of the block-floor system? (c) What is the block's speed just as the block reaches the spring?
Problem 4 In the Figure below, a 2.5 kg block slides head on into a spring with a spring constant of 320 N/m. When the block stops it has compressed the spring by 7.5 cm. The coefficient o kinetic friction between the block and the horizontal surface is 0.25. While the block is in contact with the spring and being brought to rest, what are (a) the work done by the spring force, and (b) the increase in thermal energy of the block-floor system? (c) What is the block's speed just as the block reaches the spring?
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Transcribed Image Text:Problem 4
In the Figure below, a 2.5 kg block slides head on into a spring with a spring constant of
320 N/m. When the block stops it has compressed the spring by 7.5 cm. The coefficient of
kinetic friction between the block and the horizontal surface is 0.25. While the block is in
contact with the spring and being brought to rest, what are
(a) the work done by the spring force, and
(b) the increase in thermal energy of the block-floor system? (c) What is the block's speed
just as the block reaches the spring?
320 N/m
2.5 kg
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