k and p e

A cheetah can run briefly with a speed of 31.0 m/s. Suppose a cheetah with a mass of 47.0 kg runs at this speed. What is the cheetah’s kinetic energy?

• 1457 Joules

• 22,584 Joules

• 15 Joules

• 45,167Joules

What would have the greatest kinetic energy?

• A car driving down a hill.
• A person running down a hill. 
• A ball rolling down a hill. 

Calculate the kinetic energy of a moving 4 kg object travelling at a velocity of 3 m/s.

• 18 J
• 36 J
• 12 J
• 6 J

How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s?

• 27 J
• 18 J
• 9 J
• 2 J

What is the kinetic energy of a 4kg shotput thrown with a velocity of 13m/s

• 676 J

• 52 J

• 17J

• 338 J

What is the kinetic energy of a ball with a mass of 5kg rolling at 10m/s

• 50 J

• 500 J

• 250 J

• 25 J

Calculate the gravitational potential energy of a car with a mass of 1300kg at the top of a 52m high hill.

• 4.86 x 10⁵ J

• 6.56 N

• 6.62 x 10⁵ J

• None of the answers are correct

Calculate the gravitational potential energy of a 65kg climber on top of Mount Everest (8800m high).

• 6.86 x 10⁵ N

• 7.20 x 10⁶ J

• 5.61 x 10⁶ J

• None of the answers are correct

Calculate the gravitational potential energy of a 0.88kg bird flying at an altitude of 550m.

• 4.74 x 10³ J

• 2.80 x 10³ J

• Both answers are correct

• None of the answers are correct

Lake Mead, the reservoir above Hoover Dam, has a surface area of approximately 640km². The top 1m of water in the lake weighs about 6.3 x 10¹⁵N. The dam holds that top layer of water 250m above the river below. Calculate the gravitational potential energy of the top 1m of water in Lake Mead.

• 3.86 x 10¹⁴ J

• 1.40 x 10¹⁴ N

• 1.58 x 10¹⁵ J