MP3 Concepts Review

In order for Work to happen, what 2 things must occur?

• Mass and Displacement
• Force and Mass
• Force and Work
• Force and displacement

How many joules of work are done against a cart when a force of 50 N pushes it 1 kilometer away?

• 7000 J
• 5000 J
• 5500 J
• 6600 J

Work of 2000 J is required to push an object 1.5 km. What is the force?

• 2.5 N
• 1.3 N
• 1.6 N
• 12 N

Two factors that determine work are...

• Force

• Mass

• Velocity

• Distance

Units of force are...

• Newtons

• Grams

• Joules

• Meters

If the mystery machine moves 100 meters how much work is done?

• 130,000,000 J

• 70,000 J

• 100,000 J

• 30,000 J

The faster an object moves, the ________ kinetic energy it has. 

• more
• less
• none of the above
• all of the above 

Which is the best example that something has kinetic energy?

• a. a car parked on a steep hill 
• b. a tennis ball rolling across the court
• c. a picture hanging on the wall 
• d. a piece of coal before it's burned 

What is energy?

• something that picks up things, like a magnet.

• Motion of an object

• ability to do work

• magic rays of sunshine that come down when you're feeling blue.

What is kinetic energy?

• energy of work
• energy of motion
• energy of gravity
• energy of power