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BartSMP [9]
3 years ago
7

Explain why no work has been done after Ethan pushes against a brick wall for 5 minutes that did not move.

Physics
1 answer:
Fittoniya [83]3 years ago
5 0

Answer:

D

Explanation:

I believe the answer is D, but I am not an expert.

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True or false force vectors have direction only​
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A 0.47 kg mass is attached to a spring with a spring constant of 130 N/m so that the mass is allowed to move on a horizontal fri
Sidana [21]

Answer:

F= 15.6 N,   a= 33.2 m/s^2

Explanation:

mass= m = 0.47 kg

spring constant= k = 130N/m

spring compression = x = 0.12 m

a).

force on the mass= F = k*x

F = 130 * 0.12 N

F= 15.6 N

b).

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6 0
3 years ago
A ball starts rolling down a ramp. What is the value of the change in its kinetic energy, ΔEk?
ddd [48]

For a ball that starts rolling down a ramp the value of the change in its kinetic energy, ΔEk is: Positive

<h3>Meaning of Kinetic energy</h3>

Kinetic energy can be defined as the ability assumed by an object in motion.

Kinetic energy is also said to be a form of mechanical energy that is possessed by an object to be in motion.

In conclusion, For a ball that starts rolling down a ramp the value of the change in its kinetic energy, ΔEk is: Positive

Learn more about Kinetic energy: brainly.com/question/25959744

#SPJ1

6 0
2 years ago
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