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gavmur [86]
2 years ago
11

How are power ratings used to describe machines?

Physics
2 answers:
kherson [118]2 years ago
8 0

power ratings basically just compare with how many watts are used, like a tackle in football compares to a car engine

amid [387]2 years ago
7 0

For historical reasons, the horsepower is occasionally used to describe the power delivered by a machine. One horsepower is equivalent to approximately 750 Watts. ... Thus, the power of a machine is the work/time ratio for that particular machine. A car engine is an example of a machine that is given a power rating.

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Answer:Explained Below

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The velocity time graph of a car shown below a) Calculate the magnitude of displacement of the car in 40 seconds. b) During whic
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Answer:

a) 0 metres

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c) 20 m/s

Explanation:

a) <em>Formula of displacement= velocity x time</em>

time=40 s

velocity =0 m/s

∴ displacement= 0 x 40 = 0 m

Magnitude of displacement is 0 m

b) The increase in velocity shows that there has been acceleration.

c) The average velocity of the car is =\frac{0+40}{2\\}   {initial velocity + final velocity}

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                                                             =20

Therefore, the magnitude of the average velocity  of the car is 20 m/s

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