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nikitadnepr [17]
1 year ago
6

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.
Physics
1 answer:
sesenic [268]1 year ago
3 0

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

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A 9.5 V battery supplies a 3.5 mA current to a circuit for 7.0 h. Part A How much charge has been transferred from the negative
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88.2 C

Explanation:

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The relation between charge current and time is given as

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that is ampere = coulomb / second

The amount of charge passed is from the negative to the positive terminal

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Q = I * t = 3.5mA * 7h * 3600s/h = 88.2 C

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What has research determined about the orbit of an electron around a nucleus?
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Three forces act on an object. Two of the forces are at an angle of 100◦to each other and have magnitude 25N and 12N. The third
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Answer:

F₄ = 29.819 N

Explanation:

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F₁ = (- 25*Cos 50° i + 25*Sin 50° j + 0 k) N

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F₃ = (0 i + 0 j + 4 k) N

Then we have

F₁ + F₂ + F₃ + F₄ = 0

⇒   F₄ = - (F₁ + F₂ + F₃)

⇒   F₄ = - ((- 25*Cos 50° i + 25*Sin 50° j) N + (12*Cos 50° i + 12*Sin 50° j) N + (4 k) N) = (13*Cos 50° i - 37*Sin 50° j - 4 k) N

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