Forces Flashcards
What do we need to use to know if an object is in motion?
A reference point
Reference Point
An object that is not moving to determine if an object is moving
What is a force?
A push or pull
The SI Unit for force
Newtons
How many newtons are balanced forces?
0N
Net Force
The total or final force
What is the formula for speed?
Distance/time
The faster the object the _____ the line
Steeper
What does a horizontal line on a graph mean?
The object not moving, the slope is 0.
What does SI Stand for?
System International
The SI unit for speed
Meters per second
Instantaneous Speed
The rate something is moving at a given instant
Velocity
Speed and direction
Acceleration
Increasing speed, decreasing speed, and changing direction
What two factors does the strength of friction depend on?
How hard the surfaces push each other & the types of surfaces
Mass
The amount of matter in an object
Weight
The force of gravity on an object at the surface of planet
What two factors affect the gravitational attraction of two objects?
Mass and distance
Terminal Velocity
The greatest velocity that can be reached by an object in free fall.
Air resistance
The type of fluid friction that acts on objects as they move through a fluid
Friction
A force that opposes motion when two objects are in contact
Why are units of measurement used?
To describe an objects motion
Rate
The amount of something that occurs or changes in one unit of time
How do you find the speed for an object that’s not moving at a constant speed?
Find the average speed
How do you find the average speed?
Divide the total distance traveled by the total time
What is the formula for force?
F = Mass x Acceleration