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svetlana [45]
3 years ago
11

An electric car is being driven through a town at 22 m/s. The kinetic energy of the car is 222640j. Calculate the mass of the ca

r
Physics
1 answer:
Oxana [17]3 years ago
6 0

Answer:

920 kg

Explanation:

You can figure this out using the equation for kinetic energy:

Given:

KE = 222640

v = 22

m = ?

KE = 0.5mv^2\\222640 = 0.5m(22^2)\\222640=242m\\m=920

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3 years ago
A horizontal 2.00\ m2.00 m long, 5.00\ kg5.00 kg uniform beam that lies along the east-west direction is acted on by two forces.
Sunny_sXe [5.5K]

Answer: 240\ rad/s^2

Explanation:

Given

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Also, the beam starts rotating about its center

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I=\dfrac{ml^2}{12}=\dfrac{5\times 2^2}{12}\\\\I=\dfrac{5}{3}\ kg.m^2

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7 0
3 years ago
A horizontal uniform meter stick supported at the 50-cm mark has a mass of 0.50 kg hanging from it at the 20-cm mark and a 0.30
ElenaW [278]

Answer:

70 cm

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0.5(50-20)=0.3(60-50)+0.6x\\\Rightarrow x=\dfrac{0.5(50-20)-0.3(60-50)}{0.6}\\\Rightarrow x=20\ cm

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Answer: force is 0.42 N

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