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ladessa [460]
2 years ago
9

How can i prove the conservation of mechanical energy?​

Physics
1 answer:
FinnZ [79.3K]2 years ago
5 0

Answer:

We can also prove the conservation of mechanical energy of a freely falling body by the work-energy theorem, which states that change in kinetic energy of a body is equal to work done on it. i.e. W=ΔK. And ΔE=ΔK+ΔU. Hence the mechanical energy of the body is conserved

Explanation:

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Two cars are raised to the same elevation on service- station lifts. If one car is twice as massive as the other, how do their p
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Answer:

The potential energy of the more massive one is twice that of the other.

Explanation:

Potential energy is given by

<em>PE</em> = <em>mgh</em>

where <em>m</em> = mass of body, <em>g</em> = acceleration of gravity and <em>h</em> = height or elevation.

For the less massive car, let the mass be m_1. Then its <em>PE</em> is

PE_1 = m_1gh

For the massive car, let the mass be m_2.  Its <em>PE</em> is

PE_2 = m_2gh

But m_2 =2m_1

\therefore PE_2 = 2m_1gh = 2(m_1gh) = 2PE_1

Hence, the potential energy of the more massive one is twice that of the other.

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3 years ago
3.
abruzzese [7]

Answer:

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3 years ago
How did the South American plate and African plate move?
garri49 [273]

Answer:

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Explanation:

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