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3 years ago

How much thermal energy is Generated?

Physics

2 answers:

kogti [31]3 years ago

5 0

Answer:

1000 J of thermal energy is generated.

Explanation:

The attached figure shows the whole scenario. It consists of three types of energies i.e. Gravitational Potential Energy, Kinetic Energy and thermal energy.

We know that the energy of a system remains conserved. In this case, the gravitational potential energy is the sum of kinetic energy and the thermal energy.

GPE = KE +TE

8000 J = 7000 J + TE

TE = 1000 J

So, the thermal energy is 1000 J. Hence, this is the required solution.

Archy [21]3 years ago

4 0

According to me, if you want to find this answer by fair means or foul then you can :P . Answer will be 1000J

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suppose an electrically charged ruler transfers some of its charge by contact to a tiny plastic sphere. will the ruler and the s

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3 years ago

An arrow of 43 g moving at 84 m/s to the right, strikes an apple at rest. The arrow sticks to the apple and both travel at 16.8

Aloiza [94]

Answer:

<em>The mass of the apple is 0.172 kg (172 g)</em>

Explanation:

<u>The Law Of Conservation Of Linear Momentum </u>

The total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and speed v is

P=mv.

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$P=m_1v_1+m_2v_2$

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$P'=m_1v'_1+m_2v'_2$

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P = P'

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$m_1v_1+m_2v_2=m_1v'_1+m_2v'_2$

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$m_1v_1+m_2v_2=(m_1+m_2)v'$

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We need to solve the last equation for m2:

$m_2v_2-m_2v'=m_1v'-m_1v_1$