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san4es73 [151]
3 years ago
12

Jack pushed and pushed, but no matter how hard he tried, the refrigerator would not budge! What is the BEST explanation of what

happened? A) Jack exerted a force and did work. B) Jack had no energy and did no work. C) Jack used all his potential energy to do work. D) The refrigerator did not move so no work was done.
Physics
2 answers:
Anestetic [448]3 years ago
7 0

Answer:

D) The refrigerator did not move so no work was done.

Explanation:

The refrigerator did not move so no work was done. Jack did exert a force and he did have energy. His muscles were twitching and using stored chemical energy. No work is done, though, if the force or energy does not cause an object to move. No movement, no work.

Brrunno [24]3 years ago
6 0
The answer would be C.

Hope this helps.☺
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Wewaii [24]
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5 0
3 years ago
A particle moves according to the equation x = 11t^2, where x is in meters and t is in seconds.
Savatey [412]
We are given the equation:

<span>x = 11t^2
</span>
We use that equation to calculate for the distance traveled.
For (a)

At t=2.20 sec,    
                             x =53.24 meters

At t=2.95 sec,   
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Velocity = (95.73 meters - 53.24<span> meters) / (2.95 s - 2.20 s )  = 56.65 m/s

</span>For (b)

At t=2.20 sec,    
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At t=2.40 sec,   
                             x =63.36 meters

Velocity = (63.36 meters - 53.24<span> meters) / (2.40 s - 2.20 s )  = 50.6 m/s</span>
4 0
3 years ago
How could you record the number 4000 and report 2 significant figures?
yawa3891 [41]

Explanation:

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5 0
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A Christmas sphere will break if dropped on hardwood floor with a velocity of 2.0 m/s. Mar Estefanía is
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Answer:

0.17 s

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t = 0.17 s

8 0
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Georgia [21]

Maria throws two stones from the top edge of a building at a speed of 20 m/s, The time is mathematically given as

t=4.5 sec.

<h3>How much later is it before the second stone hits?</h3>

Generally, the equation for speed  is mathematically given as

V = u+at

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0 = 22-9.8xt.

t = 22 /9.8 sec

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The extra time is taken

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Read more about Time

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7 0
1 year ago
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