Question

Asked Oct 19, 2019

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Consider the process of accelerating a car from 0 to 60 miles per hour in 10 seconds versus 30 seconds.

Select all the true statements.

The change in energy for both processes is the same.

Both processes take the same amount of work.

Both processes take the same amount of gasoline.

Both processes produce the same amount of heat.

Step 1

The change in kinetic energy depends only on mass of car , its initial and final velocities. It is independent of time taken for change in velocity. So, the statement is true.

Step 2

According to work-energy theorem, the change in kinetic energy equals the work done. Since the energy is independent of time, work done is also not related to time. Thus, the statement is correct.

Step 3

Amount of fuel burned is proportional to working time of engine. As engine works for mo...

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