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almond37 [142]
3 years ago
9

Can power be negative in physics? I am doing a lab in which I run down the stairs as quickly as possible. They are 5.4m tall and

my work is 5321.7 J. After calculating work, I got -5321.7 J. I am supposed to calculate my power used over 3 trials. The time for trial 1 was 4.69 and the seconds for trials 2 and 3 are 4.25. After calculating my power I got -1134.69 W and -1252.16 W. I am not sure if I got my power right. Is my power really negative or is my power positive?
Physics
1 answer:
RUDIKE [14]3 years ago
8 0

Answer:

Yes.

Explanation:

A negative power would just represent a loss of power. So in your case it lost -1252.16 W

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The horizontal surface on which the objects slide is frictionless. If M = 1.0 kg and the magnitude of the force of the small blo
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Answer:

The force is 7.8 N.

Explanation:

Given that,

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Here, M = 1.0 kg

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We need to calculate the acceleration of 4 kg block

Using formula of force

F=ma

a=\dfrac{F}{m}

a=\dfrac{5.2}{4}

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The 2 kg block is also accelerating at 1.3 m/s², making a total of 6 kg.

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Answer:

The initial current in the circuit is 0.1873 mA

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8 0
3 years ago
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