Kinetic Energy

Kinetic Energy

physical science

Multiple Choice

What is kinetic energy?

• When an object is in motion
• When an object is not in motion
• all of the above
• none of the above

Multiple Choice

What is the unit of measurement for kinetic energy?

• Watts
• Joules
• Newtons
• Meters

KE = 1/2 mv²

KE = 1/2 * 60.0 kg * 3.0²

KE = 1/2 * 60 * 9

KE = 1/2 * 540

KE = 270 Joules

** BE CAREFUL**

• velocity is the ONLY VARIABLE that is squared

• when solving, square velocity FIRST

• multiply v² by mass

• divide by 2 (or multiply by 0.5)

An object moving with a speed of 35 m/s and has a mass of 2.45 kg, what is its kinetic energy? 

KE = 1/2 mv²

KE = 1/2 * 2.45 * 35²

KE = 1/2 * 2.45 * 1,225

KE = 1/2 * 3,001.25

KE = 1,500.63 Joules

Multiple Choice

A bicycle and a person with a total mass of 80 kg are traveling at a velocity of 7 m/s. What is their kinetic energy?

• 156,800 J

• 1,960 J

• 0.82 J

• 7,840 J

Multiple Choice

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

• 676 J

• 3.25 J

• 17J

• 338 J

Multiple Choice

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

Multiple Choice

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

Multiple Choice

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

• 50 J
• 5 J
• 250 J
• 25 J

Multiple Choice

Between a bowling ball and a soccer ball, which one has more kinetic energy and why?

• a bowling ball because it has more mass

• a bowling ball because it is smaller

• a soccer ball because it has more mass

• a soccer ball because it is smaller

Multiple Choice

A golf pro swings his driver with a mass of 0.75 kg at a velocity of 60 m/s. What is the kinetic energy of the club?

• 22.5 J

• It doesn't have kinetic energy-it has potential energy.

• 2,700 J

• 1,350 J

Multiple Select

What is the gravitational potential energy equation (weight = mass X acceleration due to gravity)?

• PE = mass X velocity

• PE = weight X speed

• PE = weight X height

• PE = height X weight

Multiple Choice

What is the mass of a ball has a kinetic energy of 450 J, what must it mass be if it is traveling through the air at 30 m/s?

• 0.25 kg

• 15 kg

• 1 kg

• 0.50 kg

Multiple Choice

Determine the potential energy of a 5 N book that is moved to three different shelves on a bookcase. The height of each shelf is 1 m, 1.5 m, and 2.0 m.

• 5 J, 7.5 J 10 J

• 5 J, 3.3 J, 2.5 J

• 2.5 J, 5.625 J, 10 J

Multiple Choice

A baby carriage sitting at the top of a hill is at a height of 21 m high. The carriage with the baby weighs 12 N. What kind of energy does the carriage have and how much?

• potential energy and 1.75 J

• potential energy and 252 J

• kinetic energy and 252 J

• kinetic energy and 1.75 J

Multiple Choice

If the gravitational potential energy of my classroom projector is 162 J and it is 3.8 m off the ground, how much should it weigh? Round to 2 significant figures.

• 43 N

• 620 N

• 42.63 N

• 615.60 N

Multiple Choice

A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. What is the KE of the car?

• 22,400 J

• 44,800 J

• 896,000 J

• 1,792,000 J

Multiple Choice

Which of the following has the GREATEST IMPACT on the kinetic energy of an object and why?

• Mass because very small and very large things can't have the same kinetic energy.

• Velocity because its value is squared.

• Height because it can be a very large number.

• The acceleration due to gravity because it is acceleration which is more than velocity.

Multiple Choice

An 2 kg apple is hanging in a tree, 10 ft off the ground. What is the gravitational potential energy (gravity = 9.8 m/s²) of the apple?

• 960.4 J

• 98 J

• 1920.8 J

• 196 J

Multiple Choice

The acceleration of an object due to gravity on Earth is:

• The same as its velocity

• 9.8 m/s²

• It depends on the mass of an object

• Equal to its kinetic energy

Multiple Choice

A skydiver jumps from a plane and is halfway through her descent. At this point in time she has:

• Kinetic Energy

• Gravitational Potential Energy

• Both Kinetic and Gravitational Potential Energy

• She has no energy

Multiple Choice

Which of the following has the greatest amount of gravitational potential energy (gravity = 9.8 m/s²)?

• A 20 kg projector suspended 10 m in the air

• A 100 kg wrecking ball suspended 10 m in the air

• A 5 kg basketball suspended 10 m in the air

• They all have the same GPE because they are all 10 m in the air

Multiple Choice

Electrical energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Chemical energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Thermal (heat) energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Elastic energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Radiant (light) energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

A golf ball has a mass of 0.046 kg. It is dropped and has 1.1 J of gravitational potential energy (gravity = 9.8 m/s²). What height was it dropped from?

• 2.4 meters

• 234 meters

• 0.41 meters

• There isn't enough information to determine the height.

Multiple Choice

Gravitational energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

A golf pro swings his driver with a mass of 0.75 kg at a velocity of 60 m/s. What is the kinetic energy of the club?

• 22.5 J

• It doesn't have kinetic energy-it has potential energy.

• 2,700 J

• 1,350 J

Multiple Choice

Determine the potential energy of a 5 N book that is moved to three different shelves on a bookcase. The height of each shelf is 1 m, 1.5 m, and 2.0 m.

• 5 J, 7.5 J 10 J

• 5 J, 3.3 J, 2.5 J

• 2.5 J, 5.625 J, 10 J

Multiple Choice

A baby carriage sitting at the top of a hill is at a height of 21 m high. The carriage with the baby weighs 12 N. What kind of energy does the carriage have and how much?

• potential energy and 1.75 J

• potential energy and 252 J

• kinetic energy and 252 J

• kinetic energy and 1.75 J

Multiple Choice

If the gravitational potential energy of my classroom projector is 162 J and it is 3.8 m off the ground, how much should it weigh? Round to 2 significant figures.

GPE = mgh , Wg = mg , GPE = Wt h

• 43 N

• 620 N

• 42.63 N

• 615.60 N

Multiple Choice

A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. What is the KE of the car?

• 22,400 J

• 44,800 J

• 896,000 J

• 1,792,000 J

Multiple Choice

Which of the following has the GREATEST IMPACT on the kinetic energy of an object and why?

• Mass because very small and very large things can't have the same kinetic energy.

• Velocity because its value is squared.

• Height because it can be a very large number.

• The acceleration due to gravity because it is acceleration which is more than velocity.

Multiple Choice

An 2 kg apple is hanging in a tree, 10 ft off the ground. What is the gravitational potential energy (gravity = 9.8 m/s²) of the apple?

• 960.4 J

• 98 J

• 1920.8 J

• 196 J

Multiple Choice

The acceleration of an object due to gravity on Earth is:

• The same as its velocity

• 9.8 m/s²

• It depends on the mass of an object

• Equal to its kinetic energy

Multiple Choice

A skydiver jumps from a plane and is halfway through her descent. At this point in time she has:

• Kinetic Energy

• Gravitational Potential Energy

• Both Kinetic and Gravitational Potential Energy

• She has no energy

Multiple Choice

Which of the following has the greatest amount of gravitational potential energy (gravity = 9.8 m/s²)?

• A 20 kg projector suspended 10 m in the air

• A 100 kg wrecking ball suspended 10 m in the air

• A 5 kg basketball suspended 10 m in the air

• They all have the same GPE because they are all 10 m in the air

Multiple Choice

Electrical energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Chemical energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Thermal (heat) energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Elastic energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Radiant (light) energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

You throw a ball into the air as shown in the diagram. At what point does the ball have the most gravitational potential energy?

• W

• X

• Y

• Z

Multiple Choice

The SI unit in which kinetic energy is measured is 

• Newton
• Kilogram
• Joules
• Metres per second

Multiple Choice

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

Multiple Choice

An 8kg dog chases a cat. if the dog has 400J of kinetic energy. What is the speed of the dog?

• 10 m/s
• 5 m/s
• 1 m/s
• 100 m/s

Multiple Choice

What is the mass of a moving object that has 100 Joules of kinetic energy and moves at a velocity of 2 m/s?

• 50 kg
• 200 kg
• 25 kg
• 100 kg

Multiple Choice

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, how much kinetic energy does it have?

• 10 J
• 100 J
• 7 J
• 20 J

Multiple Choice

What is the kinetic energy at position Y? (ignore friction)

• 0J

• 10,000J

• 20,000J

• can not be determined

Multiple Choice

Between a bowling ball and a soccer ball, which one has more kinetic energy and why?

• a bowling ball because it has more mass

• a bowling ball because it is smaller

• a soccer ball because it has more mass

• a soccer ball because it is smaller

Multiple Choice

A golf pro swings his driver with a mass of 0.75 kg at a velocity of 60 m/s. What is the kinetic energy of the club?

• 22.5 J

• It doesn't have kinetic energy-it has potential energy.

• 2,700 J

• 1,350 J

Multiple Select

What is the gravitational potential energy equation (weight = mass X acceleration due to gravity)?

• PE = mass X velocity

• PE = weight X speed

• PE = weight X height

• PE = height X weight

Multiple Choice

What is the mass of a ball has a kinetic energy of 450 J, what must it mass be if it is traveling through the air at 30 m/s?

• 0.25 kg

• 15 kg

• 1 kg

• 0.50 kg

Multiple Choice

Determine the potential energy of a 5 N book that is moved to three different shelves on a bookcase. The height of each shelf is 1 m, 1.5 m, and 2.0 m.

• 5 J, 7.5 J 10 J

• 5 J, 3.3 J, 2.5 J

• 2.5 J, 5.625 J, 10 J

Multiple Choice

A baby carriage sitting at the top of a hill is at a height of 21 m high. The carriage with the baby weighs 12 N. What kind of energy does the carriage have and how much?

• potential energy and 1.75 J

• potential energy and 252 J

• kinetic energy and 252 J

• kinetic energy and 1.75 J

Multiple Choice

If the gravitational potential energy of my classroom projector is 162 J and it is 3.8 m off the ground, how much should it weigh? Round to 2 significant figures.

• 43 N

• 620 N

• 42.63 N

• 615.60 N

Multiple Choice

A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. What is the KE of the car?

• 22,400 J

• 44,800 J

• 896,000 J

• 1,792,000 J

Multiple Choice

Which of the following has the GREATEST IMPACT on the kinetic energy of an object and why?

• Mass because very small and very large things can't have the same kinetic energy.

• Velocity because its value is squared.

• Height because it can be a very large number.

• The acceleration due to gravity because it is acceleration which is more than velocity.

Multiple Choice

An 2 kg apple is hanging in a tree, 10 ft off the ground. What is the gravitational potential energy (gravity = 9.8 m/s²) of the apple?

• 960.4 J

• 98 J

• 1920.8 J

• 196 J

Multiple Choice

The acceleration of an object due to gravity on Earth is:

• The same as its velocity

• 9.8 m/s²

• It depends on the mass of an object

• Equal to its kinetic energy

Multiple Choice

A skydiver jumps from a plane and is halfway through her descent. At this point in time she has:

• Kinetic Energy

• Gravitational Potential Energy

• Both Kinetic and Gravitational Potential Energy

• She has no energy

Multiple Choice

Which of the following has the greatest amount of gravitational potential energy (gravity = 9.8 m/s²)?

• A 20 kg projector suspended 10 m in the air

• A 100 kg wrecking ball suspended 10 m in the air

• A 5 kg basketball suspended 10 m in the air

• They all have the same GPE because they are all 10 m in the air

Multiple Choice

Electrical energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Chemical energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Thermal (heat) energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Elastic energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Radiant (light) energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

A golf ball has a mass of 0.046 kg. It is dropped and has 1.1 J of gravitational potential energy (gravity = 9.8 m/s²). What height was it dropped from?

• 2.4 meters

• 234 meters

• 0.41 meters

• There isn't enough information to determine the height.

Multiple Choice

Gravitational energy is an example of:

• Kinetic energy

• Potential energy

Multiple Choice

Calculate the KE of a moving 4 kilogram object traveling at a velocity of 3 m/s.

• 18 J
• 36 J
• 12 J
• 6 J