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?

Kinetic energy:

Explanation:

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

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

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."