Question

what is the kinetic energy of a 1,719.44kg car that travels at 9.22 m/s?

Answer 1

Given data:

* The mass of the car is 1719.44 kg.

* The velocity of the car is 9.22 m/s.

Solution:

The kinetic energy of the car in terms of mass and velocity is,

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

where m is the mass of the car, v is the velocity of the car, and K is the kinetic energy,

Substituting the known values,

$\begin{gathered} K=\frac{1}{2}\times1719.44\times(9.22)^2 \\ K=73083.42\text{ J} \\ K=73.08\times10^3\text{ J} \\ K=73.08\text{ kJ} \end{gathered}$

Thus, the kinetic energy of the car is 73083.42 J or 73.08 kJ.