Physical Science: Unit 11 - Work and Simple Machines

A force exerted over a distance to move an object is defined as ______________________.

• power

• work

• momentum

• Watt

What is true about work? (Pick 2)

• The object must move some distance

• The object must not move

• The object must move in the same direction as the force

• The object must move in a different direction than the force

Which is NOT an example of work?

• Pushing a box across a room

• Lifting a bag onto a shelf

• Carrying a bag across a room

• Pulling a box across a room

The unit used to measure work is the 

• Watt
• Newton
• Joule
• meter

If you push a cart with a force of 60 N for 2 m, how much work have you done?

• 120 J

• 30 J

• 120 N

• 30 N

A boy pushes on a parked car with a force of 200 N. The car does not move. How much work does the boy do on the car?

• 200 N

• 200 J

• 0 J

• 0 N

What is the rate at which work is done?

• Mechanical Advantage

• Power

• Efficiency

• Speed

The unit used to measure power is the 

• Watt
• Newton
• Joule
• Newton*meter

A 5,000 N block is lifted 10 m in 25 seconds. How much power is produced?

• 2,000 W

• 20 W

• 12,500 W

• 200 W

Any device that makes work easier is called a ______________________.

• Joule 
• prop
• lever
• machine

Tags

NGSS.HS-PS3-3