Work and Power

Work & Power

An introduction

Word Cloud

In 1-2 words tell me what was the last work you did before answering this question? (This question isn't graded)

​Your answer is wrong!
Well Probably...

If you said anything regarding school work, then you are wrong! Because (by the physics definition) "mental work" is not work.

​Work = Force x Distance

By Newton's 2nd law, we know that it takes a force to change the motion of an object.

We also know that Impulse = Force x Time, so work is kind of like the distance version of impulse.

Drag and Drop

Force x ​

Placeholder

= Impulse

and

Force x ​

Placeholder

= Work

Drag these tiles and drop them in the correct blank above

Distance

Time

Mass

Speed

Velocity

Displacement

Multiple Choice

Sally and Magen are delivering cups of sweet tea for Ms. Merritt. Sally delivers a cup of sweet tea to Ms. Collins in the office, and Megan (walks past the office) and delivers a cup to Ms. Foster on A-Hall. If the two cups weighed the same amount, which girl did more work?

• Sally did more work

• Megan did more work

• They did the same amount of work

• It depends on how fast each girl walked.

No Movement, No Work

You can push on a brick wall as long and as hard as you want, but if it doesn't move, you technically haven't done any work.

Multiple Select

In Greek Mythology, Zeus punished Atlas by making Atlas hold up the sky. Atlas was supposed to hold up the sky for all eternity. Assuming Atlas is holding the sky perfectly still for all eternity, select all of the following are true.

• There is no work

• There is infinite work

• There is no impulse

• There is infinite impulse

• The impulse is the same as the work

Work is measured in Joules (J), which is Newtons x Meters

So 1 Joule = 1 Newton of force applied for a distance of 1 Meter

Drag and Drop

1 ​

Placeholder

= 1 Newton x 1 ​

Placeholder

Drag these tiles and drop them in the correct blank above

Meter

Joule

Power = work/time

It is harder to do work quickly then it is slowly, and this is where power comes in. It takes more power to push a box quickly across the floor, than it does to push the same box the same distance across the floor more slowly.

Power is measured in Watts. One watt (W) of power is consumed when one joule of work is done in one second. One kilowatt (kW) equals 1000 watts. One megawatt (MW) equals one million watts.

Match

Match the terms with the units used to measure them

• Power

• Work

• Force

• Impulse

• Time

Watts

Joules

Newtons

Newton Seconds

Seconds

• Watts

• Joules

• Newtons

• Newton Seconds

• Seconds

Dropdown

Power = ​

Select answer

/ ​

Select answer

Work = Force x ​

Select answer

Force = ​

Select answer

x Acceleration

Dropdown

1 ​ Watt is equal to 1 ​

Select answer

/1 ​

Select answer

.

1 ​

Select answer

= 1 Newton x 1 Meter

1 Newton = 1 ​

Select answer

x ( 1 ​

Select answer

/1 Second²)