Question

What is the kinetic energy of a 72.2 kg cheetah moving at a velocity of 25.9 m/s?

935 J
5450 J
48,400 J
24,200 J

Answer 1

Given:

Mass of cheetah (m) = 72.2 kg

Speed of cheetah (v) = 25.9 m/s

Equation:

`\rm KE = (1)/(2) mv^2`

Answer:

By substituting values in the equation, we get:

`\rm KE = (1)/(2) * 72.2 * (25.9)^2 \\ \\ \rm = (1)/(2) * 72.2 * 670.81 \\ \\ \rm = 36.1 * 670.81 \\ \\ \rm = 24,216.241 \\ \\ \rm \approx 24,200 \ J`

`\therefore` Kinetic energy of cheetah = 24,200 J