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3 years ago

When is work said to be done?

Physics

1 answer:

Afina-wow [57]3 years ago

6 0

Answer:

Work is said to be done when there is change in the position of the object due to the force applied on it.

Explanation:

Hope this helped! Nya~ :3

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Suppose the voltage source for a series RL-circuit were given as V0sin(ωt) instead of V0cos(ωt). Write an expression for the cur

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Answer:

Explanation:

This is an RL circuit, therefore:

Impedance; z = $\mathbf{\sqrt{R^2+L^2}}$

$\mathbf{z = \sqrt{R^2+(Lw)^2}}$

Current amplitude

$\mathbf{I_o = \dfrac{V_o}{z}} \\ \\ \mathbf{I_o = \dfrac{V_o}{\sqrt{R^2+L^2\omega ^2}}}$

Given that:

$V_o = 1.9 \ V \\ \\ \omega= 51 \ rad/s\\\\ R = 21 \Omega \\ \\ L = 0.52 H$

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Phase constant :

$tan \ \phi = \dfrac{L \omega}{R } \\ \\ tan \ \phi = \dfrac{0.52 \times 51}{21} \\ \\ tan \phi = 1.263$

$\text{Phase constant : }\phi = tan^{-1} (1.263) \\ \\ \phi = 51.6^0\\ \\\text{To radians} \phi = 51.6 \times \dfrac{\pi}{180} \\ \\ \phi = 0.287 \pi \\ \\ \mathbf{\phi = 0.9 \ rad}$

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Which of the following types of models could be used to represent a cell?

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The mass of a moving object increases, but its speed stays the same. What happens to the kinetic energy of the object as a resul

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Answer:

kinetic energy increases because of speed and motion overall

Explanation:

dont know if i helped you but you can give me a thumbs down if you hate the answer or it is not the answer you are looking for

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3 years ago

Why can water stay in bucket if you spin it upside down, if you spin the bucket fast enough? What are some practical application

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Answer:

Water stay in the bucket if the bucket is spin upside down and fast because due to centripetal force.

Explanation:

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3 years ago

When is work said to be done? ​

When is work said to be done?