Work & Simple Machines

What is the unit for work?

• Newtons
• Joules
• Power
• Meters

What is the unit for force?

• Newton
• Joule
• Power 
• Meter

How do you calculate work?

• W= F + D
• W= F/D
• W= F x D
• None of the above

What is a force?

• Someone doing a lot of work 
• A push or a pull
• Moving an object a distance
• Pushing hard

Tags

NGSS.3-PS2-1

True or False: Gravity is a force that is always acting on objects. 

• True
• False

What is work?

• Using a force to move an object a distance
• A push or a pull
• Using a simple machine
• None of the above

Work or Not? Julie pushes her car out of the mud, but it doesn't move. 

• Work 
• Not work

Work or Not? A dog digs a tennis ball out of the ground and runs away with it. 

• Work
• Not work

True or False: Does a force have to be exerted on an object for work to be done?

• True 
• False

Which of the following is not a simple machine?

• Gear
• Pulley
• Screw
• Wedge