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3 years ago

How do tests with crash dummies, seat belts, and air bags illustrate newton’s First law of motion

2 answers:

8 0

Newtons first law of motion states that an object at rest will remain at rest and an object in motion will stay in motion unless acted upon by an unbalanced force. Seat belts and air bags provide the stopping force for the crash test dummies.

emmasim [6.3K]3 years ago

7 0

Answer:

Newton law of inertia.

Explanation:

Newton first law states that if any object is in the motion or is in the state of rest then it will remain in that state till the external force is applied on that object. Inertia is the main reason of having seat belts and air bags in the car.

In this case, when seat belt trapped into the passenger than passenger experience same state of motion as car has.

When the car experience any kind of the collision then the car will stop abruptly. In this case seat belt and air bag will help in stopping the motion of passenger in the forward direction.

Therefore Newton's law of inertia is illustrated in test with seat belts, crash dummies, and air bags.

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2 years ago

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tatiyna

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3 years ago

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The equation for the speed of a satellite in a circular orbit around the earth depends on mass. Which mass?

katovenus [111]

<h3><u>Question: </u></h3>

The equation for the speed of a satellite in a circular orbit around the Earth depends on mass. Which mass?

a. The mass of the sun

b. The mass of the satellite

c. The mass of the Earth

<h3><u>Answer:</u></h3>

The equation for the speed of a satellite orbiting in a circular path around the earth depends upon the mass of Earth.

Option c

<h3><u> Explanation: </u></h3>

Any particular body performing circular motion has a centripetal force in picture. In this case of a satellite revolving in a circular orbit around the earth, the necessary centripetal force is provided by the gravitational force between the satellite and earth. Hence $F_{G} = F_{C}$ .

Gravitational force between Earth and Satellite: $F_{G} = \frac{G \times M_e \times M_s}{R^2}$

Centripetal force of Satellite : $F_C = \frac{M_s \times V^2}{R}$

Where G = Gravitational Constant

$M_e$ = Mass of Earth

$M_s$ = Mass of satellite

R= Radius of satellite’s circular orbit

V = Speed of satellite

Equating $F_G = F_C$ , we get

Speed of Satellite $V =\frac{\sqrt{G \times M_e}}{R}$

Thus the speed of satellite depends only on the mass of Earth.

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hope this helps in any way ! :)

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Kitty [74]

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