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stellarik [79]
3 years ago
15

What average mechanical power (in W) must a 70.5 kg mountain climber generate to climb to the summit of a hill of height 365 m i

n 49.0 min? Note: Due to inefficiencies in converting chemical energy to mechanical energy, the amount calculated here is only a fraction of the power that must be produced by the climber's body. HINT
Physics
1 answer:
ad-work [718]3 years ago
3 0

Answer:

Explanation:

Work done by mountain climber against his weight

= mgH

= 70.5 X 9.8 X 365

= 252178.5 J

Power = work done / time taken to do work

= 252178.5  / (49 x 60 )

= 85.775 J/s

= 85.775 W .

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7 0
2 years ago
How do Swati and Banks adjust their body position during a skydiving jump so they can fall at the same rate?
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3 0
3 years ago
The moon has a weaker gravitational force than earth. sofia weighs 50 lbs. on earth. how much will she weigh on the moon?
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3 0
3 years ago
It takes a minimum distance of 41.14 m to stop a car moving at 11.0 m/s by applying the brakes (without locking the wheels). Ass
padilas [110]

Answer:

Find the time it took for the car to stop at 11.0m/s

V = deltax/t

t = 41.14/11.0 = 3.74s

Now find at what rate it was decelerating, so find the acceleration during that interval of time.

vf = vi + at

-11.0m/s = a3.74s

a = -2.94m/s^2

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Now find how much time it would take for the car to stop at 28.0m/s but with the same acceleration, the car is the same so its acceleration to stop the car will remain the same.

vf = vi + at

0 = 28.0 - 2.94t

t = 9.52

Once the time is obtained, you can find the final position, xf, by plugging the time acceleration and velocity values.

xf = 0 + (28m/s)(9.52s) + 1/2(-2.94)(9.52s)^2

xf = 266.6m - 133.23m = 133m

8 0
4 years ago
Which of these results from destructive interference?
Mazyrski [523]
Based on the options given, the answer is two waves subtract from each other. Destructive interference happens when two waves meet each other however with different frequencies cancel each other out. 

Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
8 0
3 years ago
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