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Forces, Motion, & Energy
Forces, Motion,and Energy
43
Science
11th Grade
04/01/2009

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Term
inertia
Definition
What do we call the property of matter that keeps an object at rest or keeps it moving in a straight line?
Term
force
Definition
Any kind of a push or pull is called what?
Term
gravity
Definition
The force of attraction between Earth and other objects is called what?
Term
friction
Definition
A force that resists motion between objects that are touching is called what?
Term
back and forth
Definition
The swinging pendulum on a grandfather clock is an example of what type of motion?
Term
magnetism
Definition
The force around a magnet is called what?
Term
weight
Definition
The measure of the force of gravity on an object is called what?
Term
motion
Definition
A change in position or place of an object over time in comparison to a starting point is called what?
Term
speed
Definition
How fast an object moves is called what?
Term
acceleration
Definition
Any change in speed or direction is called what?
Term
gravity or gravitation
Definition
What force keeps the earth traveling around the sun?
Term
newton
Definition
What do we call the unit used to measure force?
Term
faster
Definition
When you apply more force to an object at rest, the object will move faster or slower?
Term
ice
Definition
What type of surface generally provides the least amount of friction? a. wood
b. cement c. ice
Term
sanding rough wood
Definition
Which would be an example of greater friction: pulling a wagon on a sidewalk or sanding rough wood?
Term
Newton's First Law of Motion
Definition
An object moving at a constant velocity keeps moving at that velocity until a net force acts on it. An object at rest stays at rest until acted on by a net force.
Term
The law of Inertia
Definition
Newton's First law is also called what?
Term
Newtons Second Law
Definition
Which of Newton's Laws Demonstrates the relationship between mass, acceleration and force?
Term
F = M x A
Definition
What is the formula that demonstrates relationship between mass, acceleration, and force? a=f/m or f=ma
Term
Force that opposes motion between two touching surfaces
Definition
What is friction?
Term
Force that pulls us down
Definition
What is gravity
Term
Any two masses exert an attractive force on each other
Definition
What is the law of gravity?
Term
Mass and Distance
Definition
What two things affect the gravity between objects?
Term
All falling objects have acceleration due to the force of gravity
Definition
What is "acceleration due to gravity"?
Term
9.8 m/sec squared
Definition
What is the numerical value of "acceleration due to gravity"?
Term
It gets weaker
Definition
What happens to gravity as you get farther from Earth's surface?
Term
Acceleration
Definition
According to Newton's 2nd Law, if you increase the force on an object____________will also increase.
Term
Every action force has an equal and opposite reaction force
Definition
Newtons Third Law of Motion
Term
Action-Reaction
Definition
According to Newton's Third Law of Motion, what are equal and opposite forces called
Term
Work = Force x Distance (moved in direction of force)
Definition
What is Work
Term
Energy cannot be made or destroyed.

Energy can only be converted from one type to another
Definition
What is the law of conservation of energy?
Term
Kinetic energy is the energy of a moving object.
Definition
What is kinetic energy?
Term
motion
Definition
An object's change in position relative to a reference point
Term
displacement
Definition
The change in position of an object
Term
Speed
Definition
The distance traveled divided by the time interval during which the motion occurred
Term
Speed = Distance/Time
Definition
What is the formula for calculating "Speed"?
Term
velocity
Definition
The speed of an object in a particular direction
Term
acceleration
Definition
The rate at which velocity changes over time; an object accelerates if its speed, direction, or BOTH change
Term
CONSTANT acceleration
Definition
a steady change in velocity
Term
weight
Definition
The force of gravity acting on an object
Term
mass
Definition
The amount of matter in an object
Term
A force can cause a resting object to move, or it can accelerate a moving object by changing the object's speed or direction
Definition
How do forces affect the motion of an object?
Term
Downward toward the center of the earth
Definition
In what direction does the Earth's gravity act?
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