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: Substitute the values into the formula

Given \(m = 600\space kg\) and \(v=12\space m/s\), substitute into \(KE=\frac{1}{2}mv^{2}\).
\(KE=\frac{1}{2}\times600\times(12)^{2}\)

Step2: Calculate \((12)^{2}\)

\((12)^{2}=144\)
So, \(KE = \frac{1}{2}\times600\times144\)

Step3: Calculate \(\frac{1}{2}\times600\)

\(\frac{1}{2}\times600 = 300\)
Now, \(KE=300\times144\)

Step4: Multiply 300 and 144

\(300\times144 = 43200\space J\)

Answer:

43,200 J