IG Phy – Work, Power and Efficiency (I)
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Question 1 of 15
1. Question
1 point(s)Work is done when the application of a force results in movement.
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Question 2 of 15
2. Question
1 point(s)Work can be done even if there is no movement.
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Question 3 of 15
3. Question
1 point(s)The equation for work done is W=F×d, where F is the force and d is the distance moved.
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Question 4 of 15
4. Question
1 point(s)One joule of work is done when a force of one newton moves an object one meter.
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Question 5 of 15
5. Question
1 point(s)Work is equal to the amount of energy transferred.
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Question 6 of 15
6. Question
1 point(s)In the formula W=F×d, d stands for the distance moved perpendicular to the force.
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Question 7 of 15
7. Question
1 point(s)A cyclist does more work when pedaling faster on a flat road compared to a slower speed over the same distance.
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Question 8 of 15
8. Question
1 point(s)The unit of work is the newton.
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Question 9 of 15
9. Question
1 point(s)When a person pushes against a stationary wall and does not move it, no work is done on the wall.
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Question 10 of 15
10. Question
1 point(s)Power is defined as the rate at which work is done or energy is transferred.
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Question 11 of 15
11. Question
1 point(s)The formula for power is P=tW, where W is work done and t is time taken.
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Question 12 of 15
12. Question
1 point(s)One watt of power is equal to one joule of work done per second.
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Question 13 of 15
13. Question
1 point(s)A powerful engine can do less work than a less-powerful engine if given more time.
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Question 14 of 15
14. Question
1 point(s)The power of a machine is measured in joules.
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Question 15 of 15
15. Question
1 point(s)If a student runs up a flight of stairs more quickly, they have more power output compared to walking up slowly.
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