Power-rate at which work is done or amount

of work done in a unit of time-The faster work can be done the more

power there is

Power = work / timeor

Power = force * distance / time

Power con’t

UNIT OF POWERUnit for work is JOULE

Power is work divided by a unit of time J / s

which is called a WATT

1 watt = 1 J / sWatt is a small unit of power

Ex. You produce about 1 watt of power if you raise a glass of water

To your mouth in 1 second.

1 kw = 1,000 WEx. A washing machine running for one hour

How to calculate?• A crane lift an 8000N beam 75m to the top of a building

in 30 sHow much power does the crane use?

Power = Force * distance (work) / time

= 8000N * 75 m / 30 s

= 600,000 / 30 s

= 20,000 W = 20 kW

If the crane lifted the beam in 60 s would the power be increased or decreased?

DECREASED

Power and Energy- recall work is the transfer of E- When considering both power (work/ time)

and E

- Power is the rate at which E can be transferred OR transformed from one object to another

- Therefore power is NOT limited to moving objects, it is found whenever E is being transferred or transformed

*****SUPERPOWERS*****If I could possess any kind of

superpower what would it be and why?-Write a HALF page paper explaining what superpower you would have if you could and why you picked this one

-Use in your paper at least eight vocabulary words in your Paper Underline each word (you can use words from p. 26 p.49 and p.72)

-Give examples of situations where your superpower would be useful

-Vocabulary words should describe what your power is and how it works

- Draw yourself as a superhero.

***Remember the general public does not know what these words mean you need to explain the word within your paper.