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G07-Forces and Motion Flashcards | StudBud
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G07-Forces and Motion
G07-Forces and Motion
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Vocabulary Review
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1
A collision in physics terminology is;
A change in an object’s velocity
When two objects crash into one another
An interaction between 2 objects that come into contact
The force is greater than the weight of an object
2
What is a simple machine?
A machine with few moving parts
A machine with no motor
A machine that uses incline planes
A machine with 1 moving part
3
Air resistance is
A force that pulls objects to the earth
Air that is heavy from a storm
A force that helps objects float in the air
A type of drag; friction caused by air
4
Simple machines make work easier because
you use less force over a long distance
they have motors that move things
they do the work for you
they are small and easy to use
5
The force applied to an object to cause motion is
Energy
Acceleration
Effort
Velocity
6
When this happens an object's motion does not change;
Balanced force
Collision
Applied force
Unbalanced force
7
Define Acceleration
Velocity
Rate of speed
Force
Rate of change of velocity
8
Forces can
change the size, color, and speed of an object
change speed, shape, and direction of an object
change the mass and shape of an object
change size, shape, and direction of an object
9
What is a Complex Machine
A wheelchair ramp
A machine with more than 1 moving part
A machine that is made from 2 or more simple machines
A lever
10
What is Mechanical Advantage?
Advantage gained by the amount of work
Advantage gained by using a mechanism to transmit force
Advantage gained by the increase of energy
Advantage gained with increased velocity
11
Most accurate description of Gravity
Attraction between 2 objects; greater mass = stronger force
A force that attracts 2 objects
Force that holds us to the earth
Two opposing forces that attract
12
Newton's first law says
An object resists a change in motion; this is called inertia
Acceleration changes the velocity of an object
Force increases speed or the direction of an object
Momentum depends on the mass and velocity of the object
13
Force that is exerted on an object that causes it to move, is...
A push, pull or twist on an object
Newtons
Joules
Work
14
The rate of acceleration at which objects fall is
Inertia
Buoyancy
Velocity
Gravity
15
Newton defined ? Laws of Motion
Four
One
Two
Three
16
A force that opposes motion between two surfaces that are touching
friction
simple machines
newtons
work
17
Force applied to an object to cause motion
Work
Effort
Gravity
Velocity
18
Unit of measure for work
Joules
watts
Newtons
Kg
19
Unit for measuring force
velocity
Kg
newtons
joules
20
Buoyancy is
The force of air that helps a plane to fly
The force of a liquid that pushes down on an object
The force of a liquid that pushes up on an object
The force that pulls an object to the bottom of the ocean
