Question

The Kentucky Derby winner last year was Medina Spirit. He won with an average speed of 15.95 m/s . If he and his jockey, John Velazquez, had a combined mass of 550 kg, what was heir kinetic energy as they crossed the finish line?

Answer 1

69960.69 J

Step-by-step explanation:

The kinetic energy is calculated as

KE = (1/2)mv²

Where m is the mass and v is the speed. Replacing m by 550 kg and v by 15.95 m/s, we get:

KE = (1/2)(550kg)(15.95 m/s)²

KE = (1/2)(550 kg)(254.4 m²/s²)

KE = 69960.69 J

Therefore, their kinetic energy was 69960.69 J