Mid Year Review

The following presentation will help you to prepare for our midyear.

Viewing this presentation will help you study in the form of flashcards, just

like we did in class. Each question is marked with

a and each answer is marked with a . As you read each question, the

answer will follow, quiz yourself to study!

What is a force that opposes

motion between two

surfaces?

Friction

What factors determine

speed?

Distance and Time

As the distance between two

objects increases, what happens to the

force of gravity between them?

The gravity between the two objects decreases

What is an object that

appears to stay in place?

A reference point

To calculate an object’s

acceleration what do you need to

know?

Final velocity, starting velocity & time it takes

to change velocity

What is the difference

between speed and velocity?

Velocity has a direction while speed does not

When something changes position what is it doing?

Moving

What is the SI unit for speed?

meters/second(distance/time)

How does mass affect the amount of gravity exerted on two objects?

The more mass objects have, the

greater the gravity between

them

In what direction is a

projectile accelerated?

horizontally & vertically

You are exerting a force on the chair you are

sitting on, is the chair exerting an equal, greater or smaller

amount of force on you?

The force that the chair exerts is equal to the force you are

exerting on it.

When a bowling ball collides with a

bowling pin, what happens to the

momentum of the ball?

The momentum of the bowling ball decreases,

as some of the momentum is

transferred to the bowling pin

If a moving boxcar gently collides with a boxcar at rest and the

two boxcars move together, what will their

combined momentum be?

The momentum of the boxcars will be equal to the momentum of

the boxcar that hit the car at rest

If an action force is a cue ball hitting a billiard ball, what is the reaction force?

The force exerted on the cue ball by

the billiard ball

If a tennis ball, a solid rubber ball and a solid steel

ball were dropped at the same time from the same

height, which would hit the ground first? (assume

there is no air resistance)

All three objects will land at the same time

(they are all in free fall)

Why does a crumpled piece of paper hit the ground before a flat

sheet of paper?

The crumpled piece of paper experiences less air resistance than the

flat sheet of paper

According to Newton’s First Law of Motion,

what will happen to a moving object that is not

acted on by an unbalanced force?

The moving object will continue moving

What makes it harder to change the motion of a

watermelon than that of an apple?

The watermelon has more mass

How does air resistance affect the

speed of a falling object?

Air resistance decreases the speed of

falling objects

Identify the bridge pictured below

Suspension Bridge

Identify the bridge pictured below

Cable Stayed Bridge

Identify the bridge pictured below

Arch Bridge

Identify the bridge pictured below

Truss Bridge

Identify the bridge pictured below

Beam bridge

A force of attraction between objects

due to their masses

gravity

A measure of the gravitational force

exerted on an object

weight

A measure of the amount of matter in

an object

mass

What is Newton’s First Law of Motion?

An object at rest remains at rest, an

object in motion remains in motion

unless acted on by an unbalanced force

What is Newton’s Second Law of Motion?

The acceleration of an object depends on the mass of the object and

the amount of force applied

What is Newton’s Third Law of

Motion?

Whenever one objects exerts a force on a second object, the

second object exerts an equal and opposite force

on the first

A push or a pull exerted on an object in

order to change the motion of the object

force

The combination of all forces acting on

an object

net force

Occurs when the net force acting on an

object is not 0N and produces a change in

motion

unbalanced force

The unbalanced force that causes objects to move in a circular path

centripetal force

Forces acting on an object that have a net force of 0N and

do not cause a change in motion.

balanced force

What is compression?

A force that acts to compress or shorten the

thing it is acting on

What is tension?

A force that acts to expand or lengthen the thing it is acting

on