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noname [10]
3 years ago
5

a car moving at 11 m/s crashes into an obstacle and stops in 0.26s. compute the Force that a seatbelt exerts on a 21-kg child to

bring him/her to a stop​
Physics
1 answer:
Natalka [10]3 years ago
4 0

Answer:

890 N

Explanation:

Acceleration is change in velocity over change in time.

a = Δv / Δt

a = (11 m/s − 0 m/s) / 0.26 s

a = 42.3 m/s²

Force is mass times acceleration.

F = ma

F = (21 kg) (42.3 m/s²)

F ≈ 890 N

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Answer:

Light does not need a medium to travel travel through, but since waves must have a medium to vibrate, sound is not created where no air is present.

Explanation:

3 0
2 years ago
1. An electric iron has a rating of 750W, 220V. Calculate:
horrorfan [7]
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6 0
3 years ago
A wheel has a constant angular acceleration of 4.5 rad/s2. during a certain 5.0 s interval, it turns through an angle of 128 rad
dalvyx [7]
The solution for this problem is through this formula:Ø = w1 t + 1/2 ã t^2 
where:Ø - angular displacement w1 - initial angular velocity t - time ã - angular acceleration 
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3 0
3 years ago
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Andru [333]
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3 0
3 years ago
24. A anvil with a mass of 60 kg falls from a height of 9.5 m. How fast is it going right
shepuryov [24]

So they give us this

V=IR

V= 1.8

I=0.4

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So we insert the thing that we know.

1.8=0.4*R

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So we have this.

Lastly we solve.

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The formula to find R is V=IR

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So the resistance will be the Voltage divided by the Current

6 0
2 years ago
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