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Nezavi [6.7K]
3 years ago
5

Does anyone know what these three are? I need help!

Physics
1 answer:
VashaNatasha [74]3 years ago
3 0

Answer:

1. A

2. C

3. A

Explanation:

I'm so sorry if I am wrong

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Answer:

40 j, 80j.

Explanation:

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What sound signal tells a river lock attendant that you wish to go through the lock?
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A train has an initial velocity of 44m/s and an accelaration of _4m/s calculate its velocity​
Kobotan [32]

Complete question:

A train has an initial velocity of 44m/s and an acceleration of -4m/s². calculate its velocity​ after 10s ?

Answer:

the final velocity of the train is 4 m/s.

Explanation:

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initial velocity of the train, u = 44 m/s

acceleration of the train, a = -4m/s² (the negative sign shows that the train is decelerating)

time of motion, t = 10 s

let the final velocity of the train = v

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v = u + at

v = 44 + (-4 x 10)

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Therefore, the final velocity of the train is 4 m/s.

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