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3 years ago

15

A car that brakes suddenly comes to a screeching halt. Is the sound energy produced in this conversion a useful form of energy?

Yes or No------ Then explain why or why not. This is due tomorrow so please help!

1 answer:

Nezavi [6.7K]3 years ago

7 0

Answer:

No, the sound produced by screeching brakes is not a useful form of energy, because it does not contribute to stopping the car.

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3 years ago

A block is attached to a horizontal spring. On top of this block rests another block. The two-block system slides back and forth

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Answer:

Angular frequency will increase

No change in the amplitude

Explanation:

At extreme end of the SHM the energy of the SHM is given by

$E = \frac{1}{2} (m_1 + m_2)\omega^2 A^2$

here we know that

$\omega^2 = \frac{k}{m_1 + m_2}$

now at the extreme end when one of the mass is removed from it

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$\omega'^2 = \frac{k}{m_1}$

So angular frequency will increase

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so here no change in the amplitude

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3 years ago