Work and Energy

A 10 kg cat runs across the room with a speed of 5 m/s. How much kinetic energy does the cat have?

• 50 Joules

• 2 Joules

• 250 Joules

• 125 Joules

Which of the following has more kinetic energy?

• A 1000 kg car moving at 10 m/s

• A 4000 kg semi truck moving at 5 m/s

• They have the same kinetic energy

A 2 kg book is sitting on a shelf 5 meters from the ground. How much gravitational potential energy does the book have? (To make things easier for now, use g = 10 m/s²)

• 2 Joules

• 10 Joules

• 50 Joules

• 100 Joules

Which has more gravitational potential energy?

• A 0.25 kg apple sitting on a countertop 1 meters off the ground

• A 1000 kg car sitting the driveway on the ground.

• They have the same gravitational potential energy

What is an example of kinetic energy?

• A bird sitting in a tree

• A bouncy ball on the table

• A car driving on the highway

• A book on shelf

Gravitational potential energy depends on the ________ and ________ of the object. 

• Height and mass
• Friction and movement
• Mass and Movement
• Height and Friction 

What kind of energy is in a rock at the edge of a cliff?

• Potential
• Kinetic
• both
• neither

At which point is potential energy greatest?

• W
• X
• Y
• Z

^{Which point has the greatest kinetic energy?}

• W
• X
• Y
• Z

units for work are

• newtons

• joules

• meters

• seconds