Question

what is the kinetic energy of a toy truck with a mass of 0.75 kg and a velocity of 4 m/s? (formula: $ke=\frac{1}{2}mv^{2}$)
3 j
6 j
12 j
24 j

Explanation:

Step1: Identify values

$m = 0.75\ kg$, $v = 4\ m/s$

Step2: Substitute into formula

$KE=\frac{1}{2}mv^{2}=\frac{1}{2}\times0.75\times4^{2}$

Step3: Calculate

$\frac{1}{2}\times0.75\times16 = 6\ J$

Answer:

6 J (corresponding to the second option in the multiple - choice list)