Work and Power Review

What is work?

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

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

• the amount of power done over a certain amount of time

• the transfer of force that occurs when energy moves an object

Tags

NGSS.HS-PS3-2

Work transfers

• sweat

• energy

• velocity

• effort

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Which is the correct unit for work?

• Work (W)

• Newton (N)

• Watt (W)

• Joules (J)

Which statements are examples of work being done?

• walking up a flight of stairs

• a waitress carrying a tray of food through a restaurant

• a book resting on a table

• throwing a baseball

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

What is the unit for power?

• Joules (J)

• seconds (s)

• Watts (W)

• Newtons (N)

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.HS-PS3-2

Which is the correct equation for work?

• W = F/d

• W = F x d

• W = F / t

• W = F x t

Which is the correct equation for power?

• P = W x t

• P = F x d

• P = W/t

• P = F/d

What will happen to the Work done on an object if the force and distance stay the same, but the time decreases?

• work will increase

• work will decrease

• work will stay the same