Question

On June 5, 2007, Rags to Riches, became the first filly to win the Belmont
Stakes horse race since 1905, running with an average speed of 16.23 m/s.
If Rags to Riches and jockey Johnny Velazquez had a combined mass of
550.0 kg, what was their KE as they crossed the finish line?​

Answer 1

Kinetic energy: $7.24\cdot 10^4 J$

Explanation:

The kinetic energy is the energy possessed by an object due to its motion. It is given by the formula

$KE=\frac{1}{2}mv^2$

where

m is the mass of the object

v is its speed

For the system in this problem, we have:

v = 16.23 m/s is the speed

m = 550.0 kg is the mass

Therefore, the kinetic energy is

$KE=\frac{1}{2}(550.0)(16.23)^2=7.24\cdot 10^4 J$