Equal forces acting on an object in opposite directions, there is no change in motion
New cards
4
Unbalanced force
two or more forces that are not equal and opposite of one another; can cause change in motion
New cards
5
Motion
An object's change in position relative to a reference point.
New cards
6
Speed
The distance an object travels per unit of time
New cards
7
Velocity
the speed of an object in a particular direction
New cards
8
Newton
SI unit of force, equal to 100g on earth
New cards
9
Friction
A force that opposes motion between two surfaces that are in contact
New cards
10
Gravity
A force of attraction between objects that is due to their masses, a distance force
New cards
11
Mass
the amount of matter in an object
New cards
12
Weight
A measure of the force of gravity on an object
New cards
13
Projectile motion
the curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth, has horizontal and vertical motion
New cards
14
Energy
The ability to do work or cause change
New cards
15
Energy transfer
The conversion of one form of energy into another, or the movement of energy from one place to another.
New cards
16
Kinetic energy
the energy an object has due to its motion
New cards
17
Potential energy
stored energy that results from the position or shape of an object
New cards
18
Horizontal force
A force that acts in a direction parallel with the horizon
New cards
19
Vertical force
A force that acts in a direction perpendicular to the horizon
New cards
20
Counteract
to act in opposition to
New cards
21
Dynamic friction
Friction that acts due to movement of one surface over another
New cards
22
Static friction
Friction that acts on objects that are not moving
New cards
23
Stationary
standing still; not moving
New cards
24
Acceleration
rate of change of velocity, change in speed or direction
New cards
25
Deceleration
negative acceleration
New cards
26
Newton's first law of motion
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
New cards
27
Newton's Second Law
Force \= mass x acceleration
New cards
28
Newton's Third Law
For every action force there is an equal and opposite reaction force
Studied by 75 people
