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VMariaS [17]
3 years ago
5

When calculating power what two pieces of information are needed?

Physics
1 answer:
velikii [3]3 years ago
6 0
It should be D work and time because power = work / time
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The strength of the force of friction depends on which two factors?
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Options A and D are correct. The strength of the force of friction depends on the objects' sizes and weights and the heat generated by the friction and the types of surfaces involved.

<h3 /><h3>What is the friction force?</h3>

It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).

Mathematically, it is defined as the product of the coefficient of friction and normal reaction.

On resolving the given force and acceleration in the different components and balancing the equation gets. Components in the x-direction.

The strength of the force of friction depends on the two factors, as;

A. The objects' sizes and weights.

D. The heat generated by the friction and the types of surfaces involved.

Hence, options A and D are correct.

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Diagram D. shows the sound waves generated by a siren

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