Question

1. What is the kinetic energy of a vehicle that has a mass of 2000.0 kg that is driving at a constant speed of 40.0 m/s?

2. What is the kinetic energy of a vehicle with a constant speed of 35.0 m/s with a mass of 4500 kg?
3. What is the mass of an animal with a kinetic energy of 12,500 J and a constant speed of 15.0 m/s?

Answer 1

1.K=1.6•10⁶J

2 K=2.7•10⁶

3. m=0.1kg

Step-by-step explanation:

1. m=2000 kg

speed=40 m/s

K=½mv²

K=½(2000•1600)J=1.6 10⁶ J

2. speed=35m/s

m=4500 kg

K=½(4500•1225)=2.7•10⁶

3. K=12,500J

speed=15 m/s

m=2K/v²

m= 25,000J/225m²/s²=0.1 kg