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If 20,000J of work is used to move a car that is broken down, how much is the change in energy that has occurred?
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If 20,000J of work is used to move a car that is broken down, how much is the change in energy that has occurred?

User Whatupwilly
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2 votes
2 votes

Answer:

K_f = 20000 J

Step-by-step explanation:

This is a conceptual exercise, where the relationship between work and kinetic energy should be used

W = ΔK

W = K_f - K₀

In this case, as the car is damaged, its initial velocity is zero and therefore its initial kinetic energy is also zero.

W = K_f

consequently the work is completely transformed into kinetic energy of the car

K_f = 20000 J

User Piotr Sagalara
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3.1k points
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