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Stolb23 [73]
3 years ago
15

A 3,568 kg elephant is riding a bicycle at a speed of 43 m/s. Out of nowhere, a zebra runs out in the elephant's path and he mus

t slam on his brakes. If the bicycle's brakes exert a stopping force of -1 kN, how far will it take to stop the bicycle?
Physics
1 answer:
Katarina [22]3 years ago
7 0

Answer:

3302 meters!

Explanation:

Wow!

The acceleration due to the stopping force of the brakes is given by Force/mass = 1000/3568 =.28m/s^-2

We will apply the equations of motion to calculate the braking distance.

V^{2} = U^{2}  + 2as; where V is the final velocity, U is the initial velocity, a is the acceleration and s is the displacement.

0=43^2-2(0.28)*s

Solve for s.

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Answer:

\mu_{k} \approx 0.719

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After some algebraic manipulation, an expression for the coefficient of kinetic friction is obtained:

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Answer:

A spring whose spring constant is 200 lbf/in has an initial force of 100 lbf acting on it. Determine the work, in Btu, required to compress it another 1 inch.

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eman Asked on February 19, 2018 in thermal fluid Sciences 4th solutions.

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