Forces, Machines and Work Jeopardy

Forces Levers & Pulleys

Calculation

Mixed Bag

10 10 10 10

20 20 20 20

30 30 30 30

40 40 40 40

50 50 50 50

Final ??

TIE b. ??

• OOPS….go to main board

Forces for 10

What happens when an unbalanced force is applied to a sitting rock?

A

Answer to Forces for 10

•The rock moves in the direction of the force.

The force that pulls objects down is called ____.

Forces for 20 pts

Answer to forces for 20

•GRAVITY

or gravitational force

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The effort it takes to pull a sled up an incline or lift a load is called the _______ _______.

A

Forces for 30 pts

Answer to forces 30

•Effort Force

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Forces 40

•Other than gravity, what two forces are acting on a paper airplane floating in the air?

Answer

Answer to forces for 40

•Fluid friction•Bouyant force

DOUBLE JEOPARDY 80 pts if correct; 20 pts if only one correct!!

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What are two non-contact forces ? ?

A

Forces for 50

CHALLENGE

CHALLENGE

CHALLENGE

If you were challenged and were correct, you get 50 pts

If you were challenged and was not correct, the team that challenged you gets 100 pts.

• Gravitational Force• Magnetic force• (Attractive forces accepted if you do

not give either of the two above)• Centripetal

Answer to forces 50 Board

• OOPS….go to main board

10 pts: Levers

What is this type (class) of lever called?

A

Answer to lever & Pulley 10 pt

»First Class Lever

» remember the other two classes also!

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Lever & pulley 20

• What is the name of this type of pulley

1N

Lever & Pulley answer to 20 pts.

If correct, you must switch with another team.

•Double fixed, single moveable

PLUS you earn 40 pts more!!

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Levers & pulley for 30

A fixed pivot point of a lever is called the…

A

DOUBLE JEOPARDY!!

• If Right You Earned 60 pts!

Fulcrum

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40 pts. Levers

What type of lever is the following?

A

40 pts lever answer

•Second class lever

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Levers for 50 pts

Label the 4 parts you see in the following diagram:

A

Answer to 50 pt lever & pulley

• Fulcrum

• Load (or Resistance) force

• Effort force

» lever/arm/or rod

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• OOPS….go to main board

Calculations for 10 pts:

•How do I calculate for work?

A

Answer to calculations 10

•Work = Force in Newtons x distance in meters

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Calculations answer for 20!

Free square = free points!! So stand at the right time…..

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Calculations for 30 pts.:

What units are Work measured in? Write it on the board….

A

Calculations answer for : 30 pts!

Work= Nm

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How would I calculate for work output?

From Calculations for 40 pts.

Switcheroo !!

A

Work Output = load force divided by effort

force

• If you got this right you may choose any table to switch the current table score with.

• If you got this wrong you do not switch, but if a reasonable attempt made you may have 20 pts.

boardCalculations answer for 40 pts.

Calculations for 50pts:

How would I calculate for Input

work?

Answer

If right, you earned not 50 pts., but 100 pts!

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DOUBLE JEOPARDY!!

Work Input = Effort distance divided by load distance

50 pt. calculations

• OOPS….go to main board

Mixed bag for 10

What type of lever is the following:

A

Mixed Bag Answer for 10

•Third class lever

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Mixed bag for 20 pts

How do we know the question about a

machine is talking about a fake machine?

(according to the data…)

SURPRISE JEOPARDY!!!

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Answer to mixed bag 20 (SURPRISE!!! EARN DOUBLE YOUR SCORE if right!! ~ if you started with 0 and got this right, go

to 300)

ANSWER --

If we look at the work output and the work input, a real machine would have friction, so work output number is LESS than the work input number.

• OOPS….go to main board

Mixed bag for 30

What does Inertia mean and which Law is it?

A

Mixed Bag Answer for 30

• In Newton’s First LawAn object at rest will remain at rest, an object in motion will remain in constant motion, unless acted upon by an unbalanced force.

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Mixed bag for 40

• Read the following and tell me agent of force (Causing it), receiver of force, what happens and what the force is called:

A 10-speed bike brake is pushed and the bike stops.

Answer to m. bag 40

• If correct, switch with another and add 80 pts.

• Not correct, means no switch and no double jeopardy!–agent of force (Causing it) : brake–receiver of force : tire (or 10-speed)–what happens : bike stops–what the force is called: friction

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Mixed bag for 50

•Explain the big idea on how all simple machines effect the work that is done on an object

Mixed Bag Answer for 50 DOUBLE JEOPARDY!! EARN 100

• A simple machine will reduce effort force needed and increase effort distance. (Work done on the object stays pretty much the same.)

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Extra for group: Which simple machine reduces effort the most?(5 pts)

And why? (10 pts)

•The following slides are final jeopardy

FINAL JEOPARDYHOW MUCH ARE YOU RISKING?? CLICK BELOW

In order for your chair to hold you up it must __________________.

Hint: Newton’s 3rd Law of motion

HOW MUCH DID YOU RISK??

Exert on you an equal force upward

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TIE BREAKER

• What is the difference between mass and weight?

DECIDE ON HOW MUCH TO WAGER AND WHOM TO ANSWER BY THEMSELVES: (YOUR WAGER ONLY AFFECTS THE TWO TIED) click below when ready -----

• Weight is the effect of gravitational force on an object’s mass while mass is only the matter and the space the object takes up.

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THE END•