Show:
Newton's Laws
Waves
Motion
Work and Power
Energy
100

The 1st law of motion is also known as the law of ________.  

inertia

100
Waves transfer what?

Energy

100

What is the formula to calculate speed?

speed = distance/time

100

What are the units for work?

Joules

100

Formula for GPE and KE

GPE=mgh

KE=1/2mv2

200

The formula that describes the second law of motion is

F = ma

200

Waves that need to travel through a medium.

Mechanical waves

200

What are the correct units for acceleration?

m/s2

200

What is the formula for power?

Power = Work/Time

200

Units for energy

Joules

300
The Earth pulls down on you.  What is the reaction force?

You pull up on the Earth

300

Waves that can travel through empty space

Electromagnetic waves

300

Billy travels east with a velocity of 5 m/s.  It takes him 20 s.  How far does he get?  

100 m

300

An elderly gentleman (m=50 kg) climbs a flight of stairs in 90 seconds.  A teenager (m=50 kg) climbs the stairs in 10 seconds.  Who does more work?

The work is the same (W=Fd)

300

Halving an objects speed changes KE by:

1/4 (quarters it)

400

Calculate the weight of a blueberry doughnut that has a mass of 0.25 kg.  

2.5 N

400

The most energetic type of electromagnetic radiation.

Gamma rays

400

The slope of a position time graph tells us:

speed/velocity

400

What happens to the power required if the time it takes to do work is cut in half?

Power doubles

400

Calculate the GPE of an object that is 20 kg and 30 m above the ground.  

6000 J

500

An object with a mass of 20 kg falls toward the Earth.  What does the force of air resistance need to be for the object to fall at terminal velocity?

About 200 N

500

What is the name of the symbol used to represent wavelength?

Lamdba

500
Luke Bryan's tour bus is headed from Tucson, AZ to Bismarck, ND, a distance of about 1600 miles.  Luke travels north 90 miles.  He forgot his guitar in Tucson, so he travels back 60 miles, then realizes his mom has a backup guitar for him in Bismarck, so he continues the rest of the way.  What is Luke's distance and displacement?

Distance:  1720 miles

Displacement:  1600 miles

500

Name 4 types of simple machines

Wedge, inclined plane, screw, pulley, wheel and axle, lever

500

An object with a mass of 2 kg has 400 J of GPE when it is 20 m above the ground.  How much KE does it have when it is 5 m above the ground?

300 J