Question

A car is moving at 12 m per 2nd and has a mass of 600 kg what is the kinetic energy of the car

Answer 1

Answer:

43,200 Joules

Explanation:

Kinetic energy can be found using the following formula:

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

where m is the mass in kilograms and v is the velocity in m/s.

We know the mass is 600 kilograms, and the car is moving at 12 meters per second. Therefore the mass is 600 kilograms and the velocity is 12 m/s.

m=600

v=12

Substitute these values into the formula.

$KE=\frac{1}{2}600*12^2$

First, evaluate the exponent: 12^2. 12^2 is the same as 12*12, which is equal to 144.

$KE=\frac{1}{2}*600*144$

Multiply 600 and 144

$KE=\frac{1}{2}*86,400$

Multiply 1/2 and 86,400, or divide 86,400 by 2.

$KE=43,200$

Add appropriate units. Kinetic energy uses Joules, or J for units.

$KE=43,200 Joules$

The kinetic energy of the car is 43,200 Joules.