Question

a car is moving at 12 m/s and has a mass of 600 kg. what is the kinetic energy of the car? (formula: ( ke = \frac{1}{2}mv^2 ))
○ 36,300 j
○ 43,200 j
○ 72,600 j
○ 86,400 j

Explanation:

Step1: Identify given values

Mass \( m = 600 \, \text{kg} \), velocity \( v = 12 \, \text{m/s} \), formula \( KE=\frac{1}{2}mv^{2} \)

Step2: Substitute values into formula

\( KE=\frac{1}{2}\times600\times(12)^{2} \)

Step3: Calculate \( v^{2} \)

\( 12^{2}=144 \)

Step4: Multiply step by step

First, \( \frac{1}{2}\times600 = 300 \), then \( 300\times144 = 43200 \)

Answer:

43,200 J