Use this formula to solve this problem:
power (p) = work (w) ÷ time (t)
sara's body supplies a force of 300 n to run up a 15 meter hill in 10 seconds.
how much power is involved in sara's run up the hill?
a.
2 watts
b.
20 watts
c.
30 watts
d.
450 watts
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Ответ:
but you didn't give us the formula for work. We have to know that.
Work = (force) x (distance)
The work to raise Sara to the top of the hill is
Work = (300 N) x (15 meters)
= 4,500 newton-meters = 4,500 joules .
Now we're ready to use the formula that you gave us. (Thank you.)
Power = (work) / (time)
= (4,500 joules) / (10 seconds)
450 joules/second = 450 watts.
Ответ:
The Oregon Trail was a major route that people took when migrating to the western part of the United States. Most people traveled in long Wagon Trains using covered wagons to carry their belongings. Some people traveled on horseback.