Physics, 01.12.2020 23:00 meganwintergirl

Which of the following cars have the most kinetic energy

Answers: 3

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Answer from: pancho99

Hey There!_____________________________________

$\huge\boxed{OptionA}$

_____________________________________DATA:Blue Car:

mass = 4 kg

velocity = 5 m/s^2

Orange truck:

Mass= 2kg

Velocity = 7m/s^2

Grey Car:

mass = 6 kg

velocity = 4m/s^2

Green Car:

Mass = 8 kg

Velocity = 3 m/s^2

_____________________________________SOLUTION:

By the equation of kinetic energy,

K.E = $\frac{1}{2} mv^2$

Where,

K.E is kinetic energy

m is mass

v is velocity

_____________________________________Kinetic energy of Blue car:

Directly substitute the variables in the equation,

K.E = $\frac{1}{2}x4x5^2$

Simplify the equation,

K.E = 50 J

_____________________________________Kinetic Energy of Silver Car:

Directly substitude the variable in the equation,

K.E = $\frac{1}{2}x6x4^2$

Simplify the equation,

K.E = 48J

_____________________________________Kinetic Energy of Green Car:

Substitute the variables in the equation,

K.E = $\frac{1}{2}x8x3^2$

Simplify the Equation,

K.E = 36J

_____________________________________Kinetic Energy of Orange Truck:

Substitute the variable,

K.E = $\frac{1}{2}x 2x7^2$

Simplify the equation,

K.E = 49J

_____________________________________

As you can see that the highest value of kinetic energy is of Blue SUV thus it will be out answer.

_____________________________________Best Regards,'Borz'

Answer from: Quest

i wanna say it’s between b and d, leaning more towards b.

Answer from: Quest

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

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Which of the following cars have the most kinetic energy
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