Calculating Energy

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

How much KE does a moving 6 kilogram object have if it moves with a velocity of 3 m/s?

• 27 J
• 18 J
• 9 J
• 2 J

A moving 10 kilogram object has 20 Joules of KE. What is its velocity?

• 2 m/s
• 4 m/s
• 200 m/s
• 10 m/s

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

• 50 kg
• 200 kg
• 25 kg
• 100 kg

As mass increases, KE ...

• increases
• decreases
• stays the same

As the velocity of an object decreases its KE will...

• increase
• decrease
• stay the same

Which has a greater impact on KE?

• mass
• velocity

What two factors affect an object's potential energy?

• area and volume

• area and height

• mass and height

• mass and velocity

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

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