Question

A football player has a mass of 110 kg. He is running at a speed of 16 mph, equivalent to 7.2 m/s. What is his kinetic energy when he tackles the opposing team's quarterback? KE = 1/2mv^2
A. 2,851.2 J
B. 5,702.4 J
C. 11,404.8 J
D. 396 J

Answer 1

To find the kinetic energy (KE) of the football player, we can use the formula KE = 1/2mv^2.

Given:
Mass (m) = 110 kg
Speed (v) = 7.2 m/s

Substituting the values into the formula:
KE = 1/2 * 110 kg * (7.2 m/s)^2

Simplifying the equation:
KE = 1/2 * 110 kg * 51.84 m^2/s^2
KE = 5,702.4 J

Therefore, the kinetic energy of the football player when he tackles the opposing team's quarterback is 5,702.4 J.

The correct answer is B. 5,702.4 J.