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Goryan [66]
3 years ago
7

A car is traveling with a velocity of 5.5 m/s and has a mass of 1200 kg. What is the kinetic energy?!

Physics
1 answer:
vesna_86 [32]3 years ago
3 0

Answer:

<h2>18150 J</h2>

Explanation:

The kinetic energy of the car can be found by using the formula

k =  \frac{1}{2} m {v}^{2}  \\

m is the Mass

v is the velocity

From the question we have

k =  \frac{1}{2}  \times 1200 \times  {5.5}^{2}  \\  = 600 \times 30.25

We have the final answer as

<h3>18150 J</h3>

Hope this helps you

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For all turning vehicles, the rear wheels follow a ______ than the front wheels.
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Shorter path

Explanation:

For all turning vehicles, the rear wheels follow <u>Shorter path</u> than the front wheels.

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A 90.0-m-long brass rod is struck at one end. A person at the other end hears two sounds as a result of two longitudinal waves,
Zanzabum

Answer:

0.174413400763 s

Explanation:

L = Length of rod = 90 m

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Y = Young's modulus = 9\times 10^9\ Pa

Velocity of sound in a material is given by

v_b=\sqrt{\dfrac{Y}{\rho}}\\\Rightarrow v_b=\sqrt{\dfrac{9\times 10^9}{8600}}\\\Rightarrow v_b=1022.99150921\ m/s

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t=\dfrac{L}{v_b}\\\Rightarrow t=\dfrac{90}{1022.99150921}\\\Rightarrow t=0.0879772697913\ s

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t=\dfrac{L}{v}\\\Rightarrow t=\dfrac{90}{343}\\\Rightarrow t=0.262390670554\ s

The time interval is 0.262390670554-0.0879772697913=0.174413400763\ s

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