Calculating Kinetic Energy

A cheetah can run briefly with a speed of 31 m/s. Suppose a cheetah with a mass of 47 kg runs at this speed. What is the cheetah’s kinetic energy?

• 1457 J

• 728.5 J

• 45,167 J

• 22,583.5 J

Tags

NGSS.HS-PS3-1

A ping pong ball has a mass of about 2.45 g. Suppose that ball is hit across the table with a speed of about 4.0 m/s. What is its kinetic energy?

• 19.6 J

• 0.0196 J

• 4.9 J

• 0.0049 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

What is the kinetic energy of a 26 kg eagle, flying at an altitude of 65 m at a speed of 19 m/s?

• 32,110 J

• 16,055 J

• 4693 J

• 247 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A polar bear has an average mass of 500 kg. If its maximum kinetic energy is 60500 J, what is its top speed?

• 242 m/s

• 121 m/s

• 15.56 m/s

• 15,125,000 m/s

Tags

NGSS.HS-PS2-1

An airplane designed to carry a space shuttle has a top speed of 236 m/s, at which its kinetic energy is 9,760,000,000 J. What is its mass?

• 175,237 kg

• 41,355,932 kg

• 87618.5 kg

• 350,474 kg

Tags

NGSS.HS-PS2-1

My bowling ball, when dropped from a roof, has 78,750 J of kinetic energy. If the ball has a mass of 7 kg, at what speed does it hit the ground?

• 22,500 m/s

• 150 m/s

• 33.9 m/s

• 1148 m/s

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

What is the mass of an object that creates 33,750 joules of energy by traveling at 30 m/s?

• 75 kg

• 15 kg

• 1125 kg

• 37.5 kg

Tags

NGSS.HS-PS3-1

Find the speed of a model rocket that has a mass of 15 kg and Has 80,000 J of kinetic energy.

• 10666.7 m/s

• 103.9 m/s

• 5333.3 m/s

• 73.03 m/s

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2