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You find that it is easier to increase your speed on your bike if you crouch

Physics

1 answer:

KATRIN_1 [288]2 years ago

3 0

Answer:

answer : d

Explanation:

apex

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Explanation:

Given data

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Initial Speed vi=2.00 m/s

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From work-energy theorem we know that the work done equals the change in kinetic energy

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$W=1/2mv_{f}^2-1/2mv_{i}^2\\F_{total}=\frac{1/2mv_{f}^2-1/2mv_{i}^2}{d} \\F_{total}=\frac{1/2(67.0kg)(8.00m/s)^2-1/2(67.0kg)(2.00m/s)^2}{25.0m} \\F_{total}=80.4N$

and we know that the force the sprinter exerted Fsprinter the force of the headwind Fwind=30.0N

$F_{sprinter}=F_{total}+F_{wind}\\F_{sprinter}=80.4N+30N\\F_{sprinter}=110.4N$

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