Physics: A 20 kg mass is flung at a velocity of 12 m/s. What is the kinetic energy of the object?

Explanation:Beautiful by Bazzi...

A 20 kg mass is flung at a velocity of 12 m/s.

Ab20600

29.03.2021

$\boxed {\boxed {\sf 1440 \ Joules}}$

Explanation:

Kinetic energy can be found using this formula:

$E_k= \frac{1}{2} mv^2$

The mass is 20 kilograms and the velocity is 12 meters per second.

$m= 20 \ kg \\v= 12 \ m/s$

Substitute the values into the formula.

$E_k= \frac{1}{2} (20 \ kg)(12 \ m/s)^2$

Solve the exponent first.

(12 m/s)²= 12 m/s * 12 m/s = 144 m²/s²

$E_k= \frac{1}{2} (20 \ kg)(144 \ m^2/s^2)$

Multiply the numbers in parentheses.

$E_k= \frac{1}{2} (2880 \ kg*m^2/s^2)$

Multiply by 1/2 or divide by 2.

$E_k=1440 \ kg*m^2/s^2$

1 kilogram square meter per square second is equal to 1 Joule. Our answer of 1440 kg*m²/s² is equal to 1440 J

$E_k= 1440 \ J$

The object's kinetic energy is 1440 Joules.

0,0(0 оценок)