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8 Cards in this Set
- Front
- Back
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A lever lifts a rock that weighs a load force of 500 N and the distance to lift it is 0.5 m, how much work must be done by the girl to lift the rock. |
500 x 0.5 = 250 J or Nm |
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There are four pulleys the first pulley has 1 wheel. The second pulley has two wheels, the third pulley has 3 wheels and the fourth pulley has 4 wheels. Which pulley reduces the effort force the LEAST? |
Pulley 1 |
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There are four pulleys the first pulley has 1 wheel. The second pulley has two wheels, the third pulley has 3 wheels and the fourth pulley has 4 wheels. Which Pulley Reduces force the MOST?
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Pulley 4 |
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If an apple falls off a tree, has work been done on the apple? If yes why? |
Yes, Gravity |
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A man is trying to break down a door using 150 N of force applied of 5 meters. Can the door withstand 1000 J or Nm of work? Explain your answer. |
150 x 5 = 750 J or Nm No, the man does not have enough force to break the door down he needs more than 1000 J or Nm. |
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Calculate the work Effort force = 50 N Effort distance = 12 m |
50 x 12 = 600 |
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T or F - Simple Machines make work easier by reducing the amount of work a person as do do. |
False - Doesn't reduce the amount of work it reduces the amount of effort. |
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Force that opposes motion |
Friction |
