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3 years ago

What is the kinetic energy of a hammer that starts from rest and decreases its potential energy by 10 kJ?

Physics

1 answer:

erma4kov [3.2K]3 years ago

3 0

Answer:

final kinetic energy of the hammer is 10 kJ

Explanation:

As we know that there is no non conservative force on the system

So here we can use the theory of mechanical energy conservation

So we will have

$\Delta K + \Delta U = 0$

here we know that

$\Delta U = - 10 kJ$

from above expression now

$K_f - K_i - 10 kJ = 0$

$K_f - 0 = 10 kJ$

so final kinetic energy of the hammer is 10 kJ

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