Work & Power in Physics

Multiple Choice

The force used in the work equation has to always be acting in the same direction as the movement of the object.

• True

• False

Multiple Choice

What is the formula for calculating power?

• Power = Work / Time

• Power = Time / Work

• Power = Work + Time

• Power = Work - Time

Multiple Choice

What two things are required for something to be called work?

• Force and motion

• Energy and time

• Mass and velocity

• Friction and distance

Multiple Choice

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power.

• Person A

• Person B

Multiple Choice

Which of the following would produce the most power?

• A mass of 10 kilograms lifted 10 meters in 10 seconds 
• A mass of 10 kilograms lifted 10 meters in 5 seconds
• A mass of 5 kilograms lifted 10 meters in 5 seconds
• A mass of 5 kilograms lifted 5 meters in 10 seconds

Multiple Choice

Of the following, which would NOT be considered work?

• An Olympic lifter lifting the bar from the ground to their chest

• The lifter taking the bar from their chest to above their head

• Holding the bar above their head with their arms fully extended

• Dropping the bar and letting it fall to the ground

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident