8.2 Practice #2 (KE & GPE)

What is the kinetic energy of a car with a mass of 600 kg and a velocity of 7 m/s?

• 2100 J

• 14,700 J

• 29,400 J

• 58,800 J

What is the mass of a truck with a KE of 3851 and a velocity of 10 m/s?

• 770.2 kg

• 385.1 kg

• 38.51 kg

• 77.02 kg

What is the velocity of a child on a swing with a mass of 35 kg and a KE of 150 J?

• 4.29 m/s

• 2.07 m/s

• 2.93 m/s

• 8.57 m/s

How high is a person on a ladder who has a GPE of 8452 J and a mass of 31 kg?

• 26,736 m

• 0.036 m

• 2672 m

• 27.8 m

What is the mass of a car 160 meters above the ground on the edge of a cliff if its GPE is 13,725 J?

• 8.75 kg

• 224,082 kg

• 841 kg

• 0.114 kg

What is the GPE of a vase that is 9.4 meters above the ground if its weight is 18 N?

• 1.91 J

• 1658 J

• 169.2 J

• 0.522 J

What does the law of conservation of energy state?

When a soccer ball rolls on the ground it has __________ energy.

When a soccer ball stops rolling, energy is converted into __________ energy.