Question

Mark pushes his broken car 140 m down the block to his friend's house. He has to exert a 160 N horizontal force to push the car at a constant speed.
How much thermal energy is created in the tires and road during this short trip?
Express your answer to two significant figures and include the appropriate units.

Answer 1

The thermal energy used by the tires is 1.14 J.

Here, the thermal energy used will be the work done by Mark.

Given,

Distance = 140 m

Force exerted = 160 N

Thermal energy = ?

We know,

Work = force * displacement

But here the thermal energy of tires is asked.

In this question, the thermal energy used is the energy consumed to do the work.

So, using the formula of work we can find the thermal energy.

W = 160 / 140 = 1.14 J

Therefore the thermal energy used by the tires is 1.14J

To learn more about thermal energy, refer: brainly.com/question/1687193

#SPJ4