Post on 11-Jan-2016
description
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