MShelJajade MShelJajade

09-01-2017
Mathematics

contestada

How fast would a(n) 74 kg man need to run in order to have the same kinetic energy as an 8.0 g bullet fired at 370 m/s?

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MissPhiladelphia MissPhiladelphia

11-01-2017

Kinetic energy, KE = 0.5 mv^2 Where m is the mass V is the velcocity
First calculate the kinetic energy of the bullet
Ke = 0.5(0.008 kg) ( 370 m/s)^2
Ke = 547.6 J

547.6 J = 0.5( 74 kg) v^2
V = 3.85 m/s

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