A Man's Kinetic Energy Calculation

Calculating Kinetic Energy of a Man

A man with a mass of 82 kg runs at a speed of 2.8 m/s. We need to calculate how much kinetic energy he has using the formula for kinetic energy.

Kinetic Energy (KE) = 1/2 * mass * velocity^2

Plugging in the values:

KE = 1/2 * (82 kg) * (2.8 m/s)^2

Calculating, we get:

KE = 321.4 Joules

The Answer

The correct answer is C. 321.4 Joules.

A man with mass 82 kg runs at a speed of 2.8 ms. How much kinetic energy does he have? A. 114.8 B. 221.8 C. 321.4 D. 642.9

Use the formula for kinetic energy. KE = 1/2mv^2 KE = 1/2*(82 kg)*(2.8 m/s)^2 KE = 321.4 J The answer is C