Question

a car with a mass of 1,500 kg is driving at 20 m/s. what is the kinetic energy of the car? (1 point)
300,000 j
150,000 j
30,000 j
15,000 j

Explanation:

Step1: Recall kinetic - energy formula

The formula for kinetic energy is $K = \frac{1}{2}mv^{2}$, where $m$ is the mass and $v$ is the velocity.

Step2: Substitute given values

Given $m = 1500\ kg$ and $v = 20\ m/s$. Substitute into the formula: $K=\frac{1}{2}\times1500\times(20)^{2}$.

Step3: Calculate the result

First, $(20)^{2}=400$. Then, $\frac{1}{2}\times1500 = 750$. So, $K=750\times400 = 300000\ J$.

Answer:

300,000 J