Physical SciencePhysical Science

Ch 2 & 3Ch 2 & 3

Test ReviewTest Review

_______ is the _______ is the rate of change rate of change

in position.in position.

MotionMotion

_______ is how _______ is how far an object has far an object has

moved.moved.

DistanceDistance

_______ is the _______ is the distance from the distance from the

starting point.starting point.

DisplacementDisplacement

_______ is the _______ is the distance an distance an

object travels per object travels per unit of time.unit of time.

Speed Speed

_______ is any _______ is any change over time.change over time.

Rate Rate

_______ is the _______ is the equation for equation for

speed.speed.

Speed = Speed = distancedistance timetime

_______ is the _______ is the speed at a given speed at a given

point in timepoint in time

Instantaneous Instantaneous speedspeed

_______ is total _______ is total distance traveled distance traveled

divided by total time.divided by total time.

Average Average SpeedSpeed

_______ _______ describes both describes both the speed and the speed and direction of an direction of an

object.object.

VelocityVelocity

The difference The difference between velocity between velocity

and speed is and speed is _______._______.Direction Direction

_______ is the _______ is the rate of change in rate of change in

velocity.velocity.

AccelerationAcceleration

_______ is _______ is negative negative

acceleration.acceleration.

DecelerationDeceleration

_______ is the _______ is the equation for equation for acceleration.acceleration.

Acceleration = Acceleration = VelocityVelocity

TimeTime

The Greek letter The Greek letter

_______ (Δ) _______ (Δ)

stands for stands for

_______._______.

Delta Delta

changechange

A _______ is a A _______ is a push or pull one push or pull one body exerts on body exerts on

another.another.

ForceForce

_______ forces _______ forces are equal in size, are equal in size, but opposite in but opposite in

direction.direction.

BalancedBalanced

_______ forces _______ forces always cause a always cause a

change in motion change in motion of an object.of an object.

UnbalancedUnbalanced

_______ forces _______ forces never cause a never cause a

change in motion change in motion of an object.of an object.

BalancedBalanced

_______ force is _______ force is when two or more when two or more forces combine.forces combine.

NetNet

_______ is the reason _______ is the reason why a table cloth can why a table cloth can be quickly removed be quickly removed from a table without from a table without disturbing the place disturbing the place

settings.settings.

InertiaInertia

State Newton’s first State Newton’s first law of motion.law of motion.

An object moving at An object moving at constant velocity constant velocity

keeps moving at that keeps moving at that velocity unless a net velocity unless a net

force acts on it.force acts on it.

_______ is the _______ is the force that opposes force that opposes

motion between motion between two touching two touching

surfaces.surfaces.

FrictionFriction

State Newton’s State Newton’s second law as an second law as an

equation.equation.

F=maF=ma

_______ is the _______ is the value of value of

acceleration due acceleration due to gravity on the to gravity on the

earth.earth.

9.8 m/s9.8 m/s22

What is the What is the equation for equation for weight of an weight of an object on the object on the

earth?earth?

W = mgW = mg

_______ is the _______ is the force air exerts force air exerts

on a moving on a moving object.object.

Air ResistanceAir Resistance

_______ is the _______ is the area where two area where two

surface “bumps” surface “bumps” stick together.stick together.

Micro weldsMicro welds

State three types State three types of friction.of friction.

Static, Static, Sliding, & Sliding, &

RollingRolling

_______ friction _______ friction occurs when an occurs when an

object is not object is not moving.moving.

StaticStatic

_______ friction is the _______ friction is the force opposing motion force opposing motion

2 touching surfaces 2 touching surfaces where micro welds where micro welds constantly break & constantly break &

reform.reform.

SlidingSliding

_______ is the _______ is the highest velocity highest velocity

that will be that will be reached by a reached by a falling object.falling object.

Terminal Terminal VelocityVelocity

Terminal velocity is Terminal velocity is when _______ when _______

is equal to _______.is equal to _______.

AccelerationAcceleration

due to gravitydue to gravity

AirAir

resistanceresistance

Explain why according to Explain why according to Newton’s 2Newton’s 2ndnd law of law of

motion why players can’t motion why players can’t hit or throw a softball as hit or throw a softball as

far as a baseball.far as a baseball.Same force is applied thing Same force is applied thing with greater mass will have with greater mass will have

a slower acc., so softball a slower acc., so softball bigger mass, will be moving bigger mass, will be moving

slower than baseball.slower than baseball.

_______ is the _______ is the reason that a reason that a

person can safely person can safely parachute from a parachute from a high-flying plane.high-flying plane.

Air ResistanceAir Resistance

Why is it that you do not Why is it that you do not feel the gravitational feel the gravitational

force between your hand force between your hand and a pencil that you hold and a pencil that you hold

in your hand?in your hand?

In comparison, your In comparison, your hand is insignificanthand is insignificant

_______ is the _______ is the measure of the measure of the force of gravity force of gravity on an object.on an object.

WeightWeight

Does gravity have Does gravity have any effect on the any effect on the

mass of a mass of a substance?substance? NONO

What are the four What are the four basic forces?basic forces?

GravityGravity

ElectromagneticElectromagnetic

Weak Nuclear ForceWeak Nuclear Force

Strong Nuclear ForceStrong Nuclear Force

_______ is _______ is anything that is anything that is thrown or shot thrown or shot through the air.through the air.

ProjectileProjectile

_______ motion _______ motion of a projectile is of a projectile is due to gravity.due to gravity.

VerticalVertical

_______ _______ _______ _______ is acceleration is acceleration

toward the center toward the center of a curved or of a curved or circular path.circular path.

Centripetal Centripetal AccelerationAcceleration

_______ _______ _______ _______ is a force acting is a force acting

toward the center toward the center of a curved or of a curved or circular path.circular path.

Centripetal ForceCentripetal Force

Explain why Explain why something in orbit of something in orbit of the earth seems to the earth seems to

be weightless.be weightless.

All falling at All falling at same speedsame speed

If an object was in If an object was in circular motion, circular motion, what path would what path would

it travel if the it travel if the motion stopped?motion stopped?

Straight lineStraight line

State Newton’s State Newton’s third law of third law of

motion.motion.

For every action For every action there is an equal but there is an equal but

opposite reactionopposite reaction

According to According to Newton’s third Newton’s third law of motion, law of motion, forces come in forces come in

_______._______.pairspairs

_______ is a _______ is a property that a property that a moving object moving object has because of has because of it’s mass and it’s mass and

velocity.velocity.

MomentumMomentum

_______ is the _______ is the equation for equation for momentum. momentum.

p = m vp = m v

State the law of State the law of conservation of conservation of

momentum.momentum.Momentum can Momentum can

neither be created neither be created nor destroyed it just nor destroyed it just

changes formschanges forms

_______ states that _______ states that momentum can momentum can

neither be created neither be created nor destroyed it just nor destroyed it just

changes forms.changes forms.

Law of Conservation Law of Conservation of Momentumof Momentum