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Tasya [4]
1 year ago
11

Auto companies frequently test the safety of automobiles by putting themthrough crash tests to observe the integrity of the pass

enger compartment.If a 1000-kg car is sent toward a cement wall with a speed of 14 m/s and theimpact brings it to a stop in 8.00 x 10-2 s, with what average force is it,brought to rest?
Physics
1 answer:
e-lub [12.9K]1 year ago
4 0
Answer:

The average force that brings the car to rest is 175000N

Explanation:

The mass of the car, m = 1000 kg

Initial speed, u = 14 m/s

Final speed, v = 0 m/s (Since the car comes to a stop)

The time taken, t = 8 x 10^-2 s

The average force is calculated as:

\begin{gathered} F=\frac{m(u-v)}{t} \\ F=\frac{1000(14-0)}{8\times10^{-2}} \\ F=\frac{14000}{0.08} \\ F=175000N \end{gathered}

The average force that brings the car to rest is 175000N

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Read 2 more answers
A solenoid with an inductance of 8 mH is connected in series with a resistance of 5 Ω and an EMF forming a series RL circuit. A
monitta

Answer:

induced EMF = 240 V

and by the lenz's law  direction of induced EMF is opposite to the applied EMF

Explanation:

given data

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current = 4.0 A

time t = 0

current grow = 4.0 A to 10.0 A

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value and the direction of the induced EMF

solution

we get here induced EMF of induction is express as

E = - L \frac{dI}{dt}    ...................1

so E = - L \frac{I2 - I1}{dt}

put here value we get

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take magnitude

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