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Force and Motion

QuestionAnswer
What is a force? A push or a pull acting on an object. Units Newtons
Balanced forces Equal in size and opposite in direction; no change in motion.
Unbalanced forces Not equal; cause a change in motion (acceleration).
Net Force The overall force acting on an object after all forces are combined.
What is acceleration? The rate at which velocity changes over time.( so any change in speed or direction!)
How can you tell if something is in motion? Its position changes relative to a reference point.
Speed: How fast something moves (scalar, no direction).
Velocity: Speed with a specific direction (vector).
Speed = distance (units are m/s) Time
Acceleration = Final velocity - starting velocity (Units are m/s/s) time
Velocity = distance with direction Time (units are m/s)
Motion An object’s position changes when compared to another object
Reference Point A place or object used for comparison to determine whether something is in motion – things that are attached to the Earth make good reference points (like trees, stop signs, buildings)
Motion is ? relative because a reference point can change
Contact Force Force that happens when one object actually touches another (or has contact with it)
EX- Contact - FRICTION / RESISTANCE / APPLIED FORCE
Non contact force Force that happens when you can’t physically see it touching the object
EX- Non-contact MAGNETIC / GRAVITY / ELECTRO
An object accelerates when: The object speeds up The object slows down The object changes direction
Created by: 30patels
 

 



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