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3 years ago

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How do you test with crash dummies seat belts and airbags Illustrate Newton’s first law of motion

1 answer:

Harrizon [31]3 years ago

3 0

According to newton first law of motion an object at rest must stay at rest, an object at motion must stay in motion. So when you are in a car driving and then you slam on the break you body moves forward towards the windshield and that because an object such as you want to be in motion because you set it on motion. Thats the same as the dummies seat belts and air bags, when a car is in a car crash it testing its seat belts and the airbags if they are fast and strong enough to stop you from going forward. Hope this helps

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A straight wire carries a 12-A current eastward and a second straight wire carries a 14-A current westward. The wires are separa

USPshnik [31]

Answer:

$5.12\cdot 10^{-4} N$

Explanation:

The force exerted between two current-carrying wires is given by

$F=\frac{\mu_0 I_1 I_2 L}{2 \pi r}$

where

$\mu_0$ is the vacuum permeability

I1 and I2 are the two currents

L is the length of the segment of wire on which we want to calculate the force

r is the distance between the wires

In this problem we have:

$I_1 = 12 A\\I_2 = 14 A\\r = 42 cm = 0.42 m\\L = 6.4 m$

Substituting into the formula, we find:

$F=\frac{(4\pi \cdot 10^{-7})(12)(14)(6.4)}{2 \pi (0.42)}=5.12\cdot 10^{-4} N$

And since the direction of the two currents is opposite, the force between the wires is repulsive.

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4 years ago

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lana [24]

The answer is C, since the velocity is not changing then neither is the acceleration

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3 years ago

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Tresset [83]

Answer:

100 Hertz

1,000 Hertz

10,000 Hertz

Explanation:

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