Good afternoon.
We have:

The function of velocity:

For
t = 5 s:
Answer:
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264Ns
Explanation:
Given parameters:
Time of the push = 3s
Force of push = 88N
Unknown:
Impulse = ?
Solution:
Impulse is defined as the change in momentum of a body when force acts on it.
Impulse = Force x time
Inputting the parameters:
Impulse = 88 x 3 = 264Ns
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Momentum brainly.com/question/9484203
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mediums only, mechanical waves always propagate through medium
Take 320 and divide by 8
320/8 = 40 mi/hr or A