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The engine weighs 4500 newtons and it is lifted 1.5 meters up by the block and tackle system. To accomplish this, the mechanic...Asked by John
The engine weighs 4500 newtons and it is lifted 1.5 meters up by the block and tackle system. To accomplish this, the mechanic must apply a force of 225 newtons while pulling a total of 37.5 meters of chain through the block and tackle pulley system. What is the work done by the block and tackle system?
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Answered by
drwls
Force applied x distance = 225 x 37.5 = 8438 J
is the work done. Only 4500*1.5 = 6750 J is used raising the engine. The rest was used overcoming friction.
The block and tackle is not 100% efficient. The efficiency is 80%
is the work done. Only 4500*1.5 = 6750 J is used raising the engine. The rest was used overcoming friction.
The block and tackle is not 100% efficient. The efficiency is 80%
Answered by
yourewelcome
6750
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