10. A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds. How much power was used? 1. How much time is needed to produce 720 Joules of work if 90 watts of power is used? 2. If 68 W of power is produced in 18 seconds, how much work is done? em well I A set of pulleys lifts an 800 N crate 4 meters in 7 seconds. What power was used?

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Chapter7: Work, Energy, And Energy Resources
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C. Power Problems
4. W - 100 J
t-10 s
P=?
**
7. W = 500 J
t=25 s
P=?
or: lo tigiow salt ei tad som
ST
5. W = 225 J
P=25 W
t=?
8. W = 336 J
t=?
P = 14 W
ontzib 91815
W
6. P 20 W
t=15 s
W = ?
9. W = ?
t = 16.6 s
P = 64 W
Torboon oth how
10. A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds. How
much power was used?
nors tar estom OS stero svom od znowo 0001 to sonol a vigas no moxow to quong all I
Hi Auto
11. How much time is needed to produce 720 Joules of work if 90 watts of power is used?
12. If 68 W of power is produced in 18 seconds, how much work is done?
how
13. A set of pulleys lifts an 800 N crate 4 meters in 7 seconds. What pow
ow to sluol 80 11 SI
power was used?
Transcribed Image Text:C. Power Problems 4. W - 100 J t-10 s P=? ** 7. W = 500 J t=25 s P=? or: lo tigiow salt ei tad som ST 5. W = 225 J P=25 W t=? 8. W = 336 J t=? P = 14 W ontzib 91815 W 6. P 20 W t=15 s W = ? 9. W = ? t = 16.6 s P = 64 W Torboon oth how 10. A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds. How much power was used? nors tar estom OS stero svom od znowo 0001 to sonol a vigas no moxow to quong all I Hi Auto 11. How much time is needed to produce 720 Joules of work if 90 watts of power is used? 12. If 68 W of power is produced in 18 seconds, how much work is done? how 13. A set of pulleys lifts an 800 N crate 4 meters in 7 seconds. What pow ow to sluol 80 11 SI power was used?
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