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Andreyy89
2 years ago
10

A sprinter starts from rest and reaches a speed of 15 m/s in 4.25 s. Find his acceleration

Physics
1 answer:
kakasveta [241]2 years ago
5 0

Answer:

a=3.53 m/s^2

Explanation:

Vo=0 m/s (because he is not moving at the start)

V1=15 m/s

t= 4.25 s

a = (V1-Vo) / t = 15/4.25 = 3.53 m/s^2

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Power(P) is the rate at which work is done. Work done (W) is the product of the force applied on the object and the displacement (s) made by the point of application of the force.

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Therefore,

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Substitute the given values of force , displacement and time

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P =\frac{W*s}{t} =\frac{124N*22.0s}{8.0s} =496 W

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1935.5 N is the "net force" acting on a car.

<u>Explanation</u>:

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