Work and Power Review

Which is the correct unit for work?

• Work (W)

• Newton (N)

• Watt (W)

• Joules (J)

What are the two requirements needed for work to be done?

• The object must move in the opposite direction of the force

• The applied force must make the object move

• The object cannot move for work to occur

• The movement must be in the same direction as the force

Which is the correct equation for work?

• W = F/d

• W = F x d

• W = F / t

• W = F x t

What is the unit for force?

• meters (m)

• Newtons (N)

• Joules (J)

• Watts (W)

What is the unit for distance?

• meters (m)

• Newtons (N)

• Joules (J)

• Watts (W)

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

• 15 J
• 45 J
• 0 J
• 5 J

What is power?

• The amount of work done over a certain amount of time

• The transfer of energy that occurs when a force moves an object

• A push or pull that changes the motion of an object

• The capacity to do work

Tags

NGSS.MS-PS3-5

What is the unit for power?

• Joules (J)

• seconds (s)

• Watts (W)

• Newtons (N)

Which is the correct equation for power?

• P = W x t

• P = F x d

• P = W/t

• P = F/d

A light bulb does 100 J of work in 10 seconds. Calculate the power used.

• 110 W

• 10 J

• 10 W

• 90 W