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KIM [24]
2 years ago
7

How much work is done when a 900 N man spends 5 minutes pushing an immovable wall?​

Physics
1 answer:
mariarad [96]2 years ago
8 0

Answer: e ven though the man exerts force on the wall , the wall does not move. Work done = force applied * displacement and since the displacement of the wall is zero. , work done is also zero

Explanation:

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One horsepower is about 745.7 watts
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Can someone help me due at 1:00 PM plus 100 points <br><br>questions B,C,D
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Describe the electron transfers that occur in the formation of calcium fluoride from elemental calcium and elemental fluorine.
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Answer:

Check explanation

Explanation:

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How do particles move when a transverse wave passes through a medium?
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3 years ago
Learning Goal: To practice Problem-Solving Strategy 7.2 Problems Using Mechanical Energy II. The Great Sandini is a 60.0-kg circ
andreev551 [17]

Answer:

v = 15.8 m/s

Explanation:

Let's analyze the situation a little, we have a compressed spring so it has an elastic energy that will become part kinetic energy and a potential part for the man to get out of the barrel, in addition there is a friction force that they perform work against the movement.  So the variation of mechanical energy is equal to the work of the fictional force

    W_{fr} = ΔEm = Em_{f} -Em₀

Let's write the mechanical energy at each point

Initial

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Final

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Let's use Hooke's law to find compression

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Let's write the energy equation

    fr d = ½ m v² + mgy - ½ k x²

Let's clear the speed

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   v = √ (229.66)

   v = 15.8 m/s

5 0
3 years ago
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