Physics: Power Thur 01/13

Physics: Power

Thursday 01/13

By Jessica Arthur

Multiple Choice

The ability to do work is _?_

• force

• power

• energy

• kinetics

Multiple Choice

True/False: The work of friction always removes energy from a system.

• True

• False

Multiple Choice

Work of friction formula

• Fd

• ukm x d

• uk x d

• ukFn

Multiple Choice

On a level surface, such as a road, you can assume the PE is _?_

• equal to KE

• PE + KE

• less than KE

• zero

Multiple Choice

If an object is at rest on the top of the hill, you can assume the KE is _?_.

• equal to PE

• Less than PE

• KE + PE

• zero

Multiple Select

If an object is at stops at the bottom of a hill, you can assume the _?_ is equal to zero.

• TMEafter

• TMEbefore

• PE

• Wf

Multiple Choice

In order to calculate power, then time must be in _?_.

• hours

• minutes

• seconds

• any unit

Multiple Choice

In order to calculate power, then displacement just be in what unit?

• km

• m

• cm

• any unit

Multiple Choice

J/s is _?_.

• Watts

• calorie

• horsepower

• J/s (no special unit)

Open Ended

In the solution to the example problem (1.8 W) how does this compare to an average light bulb's wattage (60 W)?