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A sprinter has a mass of 80 kg and a kinetic energy of 2500 J. What is the sprinter's speed?

A sprinter has a mass of 80 kg and a kinetic energy of 2500 J. What is the sprinter's speed?
asked 16.3k views
19 votes
A sprinter has a mass of 80 kg and a kinetic energy of 2500 J. What is the sprinter's speed?

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User Artyom Amiryan
by
7.6k points

1 Answer

5 votes
Using KE = 1/2mv^2
m = mass (80kg)
v = velocity (?)
KE = kinetic energy (2500J)
2500/((1/2) x (80)) = v^2
Square root the answer to get: 7.91 m/s
answered
User Zambesianus
by
8.4k points
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