Physics – ReviewLinear Motion

It’s time to play…

Physics Jeopard

y

Rules for the GameWhen it is your team’s turn, select a category and an amount.

After Mr. Dillon has finished asking the question, any team may buzz in. If you buzz in early, you will not be called on.If the team that buzzes in answers correctly, they get those

points and choose the next category. If the team answers incorrectly, they lose the points. Mr.

Dillon will then re-read the question so the other teams can have a chance to answer. A team is NOT obligated to

answer if they do not want to.There will be a Final Jeopardy question at the end of the

game where teams can wager the points they have earned.

Any questions?

Today’s Categories

Scalar or VectorWhat Are the Units?Finish the Formula…

“Free Fallin’”“g”

The Answer is 4.9

Regular Jeopardy

Scalar or Vector

What are the Units?

Finish the Formula…

100 100 100200 200 200300 300 300400 400 400500 500 500

“Free-Fallin’” “g” The Answer is 4.9

100 100 100200 200 200300 300 300400 400 400500 500 500

Go to Final JeopardyGo to Double Jeopardy

100 Points

SpeedScalar Quantity

Back to Game Board

200 Points

VelocityVector Quantity

Back to Game Board

300 Points

DistanceScalar Quantity

Back to Game Board

400 Points

Displacement

Vector Quantity

Back to Game Board

500 Points

Acceleration

Vector Quantity

Back to Game Board

100 PointsThis unit is the typical SI

(metric) unit for distance.

Meter (m)

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200 PointsThis is an example of a

unit for speed.

Meters per second (m/s)

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300 PointsThis unit is the typical SI

(metric) unit for displacement.

Meters (m)

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400 PointsThis is an example of a

unit for velocity.

Meters per second (m/s)

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500 PointsThis is an example of a unit for acceleration.

Meters per second per second (m/s2)

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100 PointsAverage Velocity: v = …

or

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tdv

2fi vvv

200 PointsFinal Velocity: vf = …

Back to Game Board

atvv if

300 PointsAcceleration: a = …

Back to Game Board

tvv

tva if

400 PointsDistance: d = …

Back to Game Board

2

21 tatvdd ii

500 PointsFinal VelocitySquared: vf

2 = …

Back to Game Board

davv if 222

100 PointsThis is the band that is famous for recording

the song: “Free Falling.”

Tom Petty and the Heartbreakers

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200 PointsThis is how the main line of the chorus goes… (be

sure to sing it to get your points.)

Now I’m free… Free fallin’.

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300 PointsAccording to the lyrics,

“She’s a good girl…She’s crazy about…”

this person.Elvis

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400 PointsAccording to the lyrics, you need to “move west down…” this boulevard.

Ventura

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500 PointsThis is the Tom Cruise

movie where his character sings “Free Falling” …significantly

off key…Jerry McGuire

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100 PointsThis is the value of “g” in meters/second2 on

Earth.

9.8 m/s2

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200 PointsThis is the value of “g”

in feet/second2 on Earth.

32 ft/s2

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300 PointsThis is the quantity that the constant “g” stands

for.

Acceleration Due to Gravity

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400 PointsTrue or False: Gravity

on Earth accelerates all objects in the same way.

True

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500 PointsThis is usually the

primary cause of why objects in free fall do

not always accelerate at 9.8 m/s2. Air Resistance

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100 PointsThis is half of “g” on

Earth.

4.9 m/s2

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200 PointsThis is how far you

would travel during the first second of free fall

on Earth.4.9 meters

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300 PointsThis is your acceleration

down a ramp that is inclined at a 45 angle

(assuming no friction). 4.9 m/s2

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400 PointsThis is your average

speed during the first second of free fall on

Earth.4.9 m/s

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500 PointsSimplify:

4.9

Back to Game Board

75.025.020162662

Today’s Categories

“Free Fallin’” for RealGraph This

Begins with “D”Constant Velocity?Vocab Schmocab

Solve This

Double Jeopardy

“Free-Fallin’” for Real Graph This Begins with

“D”200 200 200400 400 400600 600 600800 800 8001000 1000 1000

Constant Velocity?

Vocab Schmocab Solve This

200 200 200400 400 400600 600 600800 800 8001000 1000 1000

Go to Final Jeopardy

200 PointsAn object in free-fall is technically only being

acted on by this.

Gravity

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400 PointsThis is value of “g” on

Earth.

9.8 m/s2

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600 PointsAfter the first second of free-fall, an object will

be moving this fast (assuming no air

resistance).9.8 m/s

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800 PointsAfter the first second of free-fall, an object will be accelerating at this rate (assuming no air

resistance).9.8 m/s2

Back to Game Board

1000 PointsSuppose that a feather and a

brick are released from rest at the same time and from the

same height. This object will hit the ground first (assuming

no air resistance).They will hit at the same time.

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200 PointsOn a position (or

distance or displacement) versus time graph, the slope tells you about this.

Speed or Velocity

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400 PointsOn a velocity (or speed) versus time graph, the slope tells you about

this.Acceleration

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600 PointsOn a velocity (or speed) versus time graph, the area “under the curve”

tells you about this.Distance or Displacement

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800 PointsOn a position (or

distance or displacement) versus

time graph, the sign of the slope tells you about

this.Direction

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1000 PointsBased on the graph below, what is the acceleration, velocity, and

totaldisplacement

at t = 6 seconds?a = 0 m/s2;

v = 20 m/s; d = 80 m

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200 PointsThis is how far an object travels, but direction is

not important.

Distance

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400 PointsThis is how far an object

ends up from it’s original starting point

(direction is important).Displacement

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600 PointsThis is the primary

difference between a scalar quantity and a

vector quantity.Direction

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800 PointsGravity always acts in

this direction.

Down

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1000 PointsThis is another word for a negative acceleration.

Deceleration

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200 PointsConstant velocity?

Moving at the same speed and in the same

direction.Yes.

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400 PointsConstant velocity?

Increasing your speed.

No.

Back to Game Board

600 PointsConstant velocity? An

object experiencing free fall.

No.

Back to Game Board

800 PointsConstant Velocity? Traveling at 50 mph

north and then traveling at 50 mph west.

No.

Back to Game Board

1000 PointsConstant velocity? Driving at the same

speed in a circle.

No.

Back to Game Board

200 PointsThis word is used in

physics to mean “with respect to.” It implies

the notion of perspective.

Relative

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400 PointsThis word is used to

described motion that is in a straight line.

Linear

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600 PointsThis word describes how

fast “something” is done with respect to

time.Rate

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800 PointsThis word describes speed, velocity, or

acceleration at a specific moment in time.

Instantaneous

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1000 PointsThis word describes speed, velocity, or

acceleration over an entire trip or span of

time.Average

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200 PointsAn apple takes 2.0

seconds to fall from rest to the ground. This is how fast (in m/s) the apple is

moving right before it hits the ground.19.6 m/s

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400 PointsAn apple takes 2.0

seconds to fall from rest to the ground. This is how far above the ground the

apple was initially. 19.6 meters

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600 PointsBob jumps off the

ground with an initial velocity of 1.2 m/s. This is the total time that he

is in the air.0.24 seconds

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800 PointsA car accelerates from

rest to 25 m/s in 5 seconds. This is the car’s acceleration.

5 m/s2

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1000 PointsA ball is thrown straight down

from a cliff with an initial downward velocity of 12 m/s. If the ball takes 4 seconds to

hit the ground, this is the height of the cliff.

126.4 meters

Back to Game Board

FINAL JEOPARDYThe category for Final Jeopardy

is...

BobWrite down your wager

now.Here is the question…

FINAL JEOPARDYBob jumps up in the air

with an initial velocity of 4 m/s. Assuming that there is no air resistance (and

that he is an NBA superstar), this is how

high he jumps.0.816 meters

Physics – ReviewLinear Motion

And the winner is…Physic

s is phun!