3 years ago

How far would a car travel if it has a speed of 75km/ and travels for 7hours?

1 answer:

8 0

V=75 km/h(speed)
t=7 h(time)
s=?(distance)

s=v×t
s=75×7
s=525km

It would travel 525km

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Vitek1552 [10]

The elongation of the rod is $5.51 \times 10^{-4}m$ `

<h3>Young Modulus of a substance</h3>

The young modulus of a substance is the<u> ratio of stress to the strain</u> of material.

$Modulus = \frac{Stress}{Strain}\\ Modulus =\frac{Fl}{Ae}$

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Required

Extension of the rod "e"

Substitute the given parameters into the formula to have;

$e=\frac{Fl}{A \gamma} \\e=\frac{5000 \times 5}{0.362984 \times 125,00,000}\\e=\frac{25000}{45,373,000}\\e= 5.51 \times 10^{-4}m$

Hence the elongation of the rod is $5.51 \times 10^{-4}m$ `

Learn more on young's modulus here: brainly.com/question/6864866

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