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DENIUS [597]
3 years ago
7

a car brakes from 100 m/s to 5 m/s in 100 meters. Is this an example describing velocity, speed, or acceleration?

Physics
1 answer:
FinnZ [79.3K]3 years ago
3 0
This example describes velocity.
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Answer:

a) 20 seconds

b) No.

Explanation:

t = Time taken for jet to stop

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s = Displacement of the jet (Distance between the moment the jet touches the ground to the point the point it stops)

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v=u+at\\\Rightarrow t=\frac{v-u}{a}\\\Rightarrow t=\frac{0-100}{-5}\\\Rightarrow t=20\ s

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s=ut+\frac{1}{2}at^2\\\Rightarrow s=100\times 20+\frac{1}{2}\times -5\times 20^2\\\Rightarrow s=1000\ m

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