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Surprisingly, very few athletes can jump more than 2 feet

Chapter 3, Problem 5P

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QUESTION:

Surprisingly, very few athletes can jump more than 2 feet (0.6 m) straight up. Use \(\mathrm{d}=1/2\ gt^2\) to solve for the time one spends moving upward in a 0.6-m vertical jump. Then double it for the “hang time”—the time one’s feet are off the ground.

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QUESTION:

Surprisingly, very few athletes can jump more than 2 feet (0.6 m) straight up. Use \(\mathrm{d}=1/2\ gt^2\) to solve for the time one spends moving upward in a 0.6-m vertical jump. Then double it for the “hang time”—the time one’s feet are off the ground.

ANSWER:

Step 1 of 2

We know the equation of motion,

\(d=1 / 2 a t^{2}\) ………(1)

Where, d is the total distance travelled,

u is the initial velocity,

a is the acceleration and for this case \(a=g=9.8 \mathrm{~m} / \mathrm{s}^{2}\),

t is the time interval.

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