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| 1 | |
You do 222 J of work pushing a box up a ramp. If the ramp does 200 J of work, what is the efficiency of the ramp? |
| | A) | 90% |
| | B) | 82% |
| | C) | 75% |
| | D) | 96% |
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| 2 | |
You do 15,000 J of work with a screw jack. If the screw jack does 14,500 J of work, what is the efficiency of the screw jack? |
| | A) | 75% |
| | B) | 88% |
| | C) | 97% |
| | D) | 55% |
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| 3 | |
You do 1200 J of work with gears. If the gears do 1000 J of work, what is the efficiency of the gears? |
| | A) | 75% |
| | B) | 83% |
| | C) | 77% |
| | D) | 89% |
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| 4 | |
You do 50 J of work with a lever. If the lever does 45 J of work, what is the efficiency of the lever? |
| | A) | 97% |
| | B) | 85% |
| | C) | 95% |
| | D) | 90% |
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| 5 | |
You do 1260 J of work with a wheel and axle. If the wheel and axle does 1200 J of work, what is the efficiency of the wheel and axel? |
| | A) | 95% |
| | B) | 88% |
| | C) | 84% |
| | D) | 97% |
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| 6 | |
You do 75 J of work with a wedge. If the wedge does 65 J of work, what is the efficiency of the wedge? |
| | A) | 90% |
| | B) | 87% |
| | C) | 92% |
| | D) | 95% |
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| 7 | |
You do 42 J of work with scissors. If the scissors do 40 J of work, what is the efficiency of the scissors? |
| | A) | 78% |
| | B) | 75% |
| | C) | 95% |
| | D) | 80% |
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| 8 | |
You do 400 J of work with a pulley. If the pulley does 380 J of work, what is the efficiency of the pulley? |
| | A) | 98% |
| | B) | 90% |
| | C) | 77% |
| | D) | 95% |
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| 9 | |
You do 260 J of work pushing a box up a ramp. If the ramp does 200 J of work, what is the efficiency of the ramp? |
| | A) | 77% |
| | B) | 73% |
| | C) | 83% |
| | D) | 85% |
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| 10 | |
You do 280 J of work with a pulley. If the pulley does 275 J of work, what is the efficiency of the pulley? |
| | A) | 95% |
| | B) | 98% |
| | C) | 92% |
| | D) | 70% |
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