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3 years ago

9

A 48-kg boy is running on a track at 6m/s . What is the boys kinetic energy?

2 answers:

expeople1 [14]3 years ago

7 0

Given:
m = 48 kg, the mass of the boy
v = 6 m/s, the boy's running speed

By definition,
the kinetic energy (KE) of the boy is
KE = (1/2)*m*v²
= 0.5*(48 kg)*(6 m/s)²
= 864 J

Answer: 864 J

balu736 [363]3 years ago

3 0

<span>864 J In order to calculate kinetic energy the mass of the moving body and it's velocity must be known. In this case the mass is 48 kg and the velocity is 6 m/s. The formula for kinetic energy is: Kinetic Energy = 1/2 * (Mass) * (Velocity^2) = 1/2 (48 kg) * ((6 m/s)^2) = 864 kg* (m/s)^2 = 864 J</span>

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