This is...This is...

ForcesForces

Here are Here are the the

categories.categories.....

3 Laws3 Laws

FrictionFriction

UnbalancedUnbalancedForcesForces

Misc.Misc.

3 Laws Friction Unbal. Force Misc.

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Define Define Newton’s 1Newton’s 1stst

LawLaw

An object in motion An object in motion (constant velocity) (constant velocity)

stays in motion, and stays in motion, and an object at rest an object at rest

stays at rest, unless stays at rest, unless acted on by an acted on by an

unbalanced force.unbalanced force.

In words, In words, what is what is

Newton’s Newton’s 22ndnd Law? Law?

Force is Force is equal to the equal to the product of product of the mass the mass

and and accelerationacceleration

What are the What are the 3 equations 3 equations

used in used in Newton’s 2Newton’s 2ndnd

law?law?

F= M x AF= M x AM = F/AM = F/AA = F/MA = F/M

What is What is Newton’s 1Newton’s 1stst

Law also called? Law also called?

The Law of The Law of InertiaInertia

Name three Name three types of types of Friction?Friction?

Rolling Rolling FrictionFrictionSliding Sliding FrictionFriction

Fluid FrictionFluid FrictionStatic Static

FrictionFriction

What are three What are three forces a person forces a person rollerblading is rollerblading is experiencing?experiencing?

Rolling Rolling FrictionFriction

Fluid FrictionFluid FrictionGravityGravityInertiaInertia

What is What is friction?friction?

Friction is the Friction is the force created force created

when 2 when 2 surfaces rub surfaces rub

together.together.

What What direction direction

does does friction friction

always go?always go?

Friction is the Friction is the force that is force that is

opposite to the opposite to the direction of the direction of the

movement of the movement of the object.object.

What is it What is it called when called when two two unequalunequal forces are forces are

acting on the acting on the same object?same object?

Unbalanced Unbalanced ForcesForces

When an When an unbalanced unbalanced

force is force is applied to an applied to an object, the object, the

result result is________?is________?

AcceleratioAccelerationn

(or (or movement)movement)

If two forces are acting If two forces are acting in the same direction on in the same direction on the same object. (They the same object. (They are working together) are working together) How do you calculate How do you calculate

the net force?the net force?

When in the same When in the same direction you adddirection you add

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Bet how much you

are willing to risk

When gravity When gravity and air and air

resistance are in resistance are in balance (they balance (they

are equal), what are equal), what happens to the happens to the

velocity of a velocity of a falling object?falling object?

The velocity The velocity remains remains

constant.constant.

What is What is force?force?

A push or a A push or a pullpull

When mass is When mass is increased, and increased, and acceleration acceleration

remains constant, remains constant, what happens to what happens to

force?force?

Force also Force also increases.increases.

Given Force and Given Force and Mass, what is Mass, what is

the equation to the equation to find find

acceleration?acceleration?

Acceleration = Acceleration = ForceForceMassMass

What is What is inertia?inertia?

The tendency The tendency of objects to of objects to

resist a resist a change in change in motion.motion.

DOUBLE

JEOPARDY

CalculatioCalculationsns

GravityGravity

Elastic Elastic ForceForce

MiscMisc

Calculations

Gravity Elastic Force

Misc

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How much force is How much force is required to move a required to move a

15 kg skeleton at an 15 kg skeleton at an acceleration of 3 acceleration of 3

m/s/s?m/s/s?

45 kg45 kg●●m/s/sm/s/s45 N45 N

A 2 kg skateboard hits A 2 kg skateboard hits the planter with a force of the planter with a force of

46 N (kg•m/s/s) , what 46 N (kg•m/s/s) , what was its acceleration?was its acceleration?

23 m/s/s23 m/s/s

topic1 topic2 topic3 topic4

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DoubleDouble JeopardyJeopardy

How much are you and your

team willing to risk?

If a 2,500 kg Toyota If a 2,500 kg Toyota accelerates 5.8 accelerates 5.8

m/s/sec and a 2,700 m/s/sec and a 2,700 kg Honda kg Honda

accelerates 5.4 accelerates 5.4 m/s/s. Which car has m/s/s. Which car has the greatest force the greatest force and by how much?and by how much?

Toyota = 14,500 NToyota = 14,500 NHonda = 14,580 NHonda = 14,580 NThe Honda has a The Honda has a

greater force by 80N greater force by 80N

What is the What is the net force? net force?

6 N6 N 2N2N

4 N4 N

What causes What causes gravity on gravity on

Earth?Earth?

The mass The mass of the of the EarthEarth

Why does your weight Why does your weight change if you travel to change if you travel to the moon, but your the moon, but your mass does not?mass does not?

Weight is a measure Weight is a measure of gravity.of gravity.Mass is the Mass is the amount of matter amount of matter in something. in something. Mass does not Mass does not change.change.

Where would an Where would an object have a object have a

greater weight?greater weight?

The sun, a place The sun, a place with more gravitywith more gravity

What forces are What forces are acting upon this acting upon this falling sphere?falling sphere?

Gravity is pulling down, fluid Gravity is pulling down, fluid friction is pushing it up.friction is pushing it up.

Fluid Fluid FrictionFriction

GravitGravityy

Matter is Matter is considered considered elastic if…?elastic if…?

……it returns to it returns to its original its original

shape after it shape after it has been has been

squeezed or squeezed or stretched.stretched.

What are two What are two types of types of

elastic forces?elastic forces?

Tension and Tension and CompressionCompression

Which elastic Which elastic force force

describes describes standing?standing?

CompressionCompression

What forces What forces does a hanging does a hanging

yo-yo yo-yo experience?experience?

Tension pulling Tension pulling up on the yo-yo up on the yo-yo by the string, by the string, and gravity and gravity

pulling down on pulling down on the yo-yo.the yo-yo.

What are the two What are the two components components

(parts) of Force (parts) of Force as represented as represented by an arrow?by an arrow?

Magnitude Magnitude (size or (size or

amount) and amount) and DirectionDirection

How does one How does one determine how determine how

strong a force is by strong a force is by looking at an looking at an

arrow?arrow?

The strength is The strength is determined by the determined by the

length of the arrow.length of the arrow.

When rolling 4 When rolling 4 separate bowling separate bowling

balls (6lb, 8lb, 10lb, balls (6lb, 8lb, 10lb, 12lb) with the 12lb) with the same same

forceforce, which will , which will move the fastest?move the fastest?

The 6lb bowling The 6lb bowling ball.ball.

topic1 topic2 topic3 topic4

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DoubleDouble JeopardyJeopardy

How much are you and your

team willing to risk?

Why is a car driving Why is a car driving around and around a around and around a

track at the exact track at the exact same speed same speed experiencing experiencing

unbalanced forces?unbalanced forces?

The car is The car is experiencing experiencing unbalanced unbalanced

forces because it forces because it is in motion. is in motion.

Final Final JeopardJeopard

y y You’ll have 60 You’ll have 60

secondsseconds

ForcesForces

Make your wagers nowMake your wagers now

A baseball player catches a A baseball player catches a fly ball in his glove. What fly ball in his glove. What type of force did he apply to type of force did he apply to the ball in order to get it to the ball in order to get it to stop?stop? Which direction?Which direction?

A unbalanced force – it A unbalanced force – it changed the motion of the changed the motion of the ballball