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

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.