force notes 03-01-2013
- A force is a push or pull on an object
- force gives energy to an object, sometimes causing it to start or stop moving or change direction
- the net force is the "leftover" amount when all forces are added or subtracted
- if there is a net force, the object will change its direction or velocity. This i called acceleration.
- ----> = <---- (no net force)
- -----> = <---- (more net force on left side)
- an unbalanced force- when a net force changes an objects motion
- balanced force- an equal forces acting on one object in oposite directions.
- Speed is the distance an object travels in one unit of time
- speed is a scalar quantity-shows distance over time
- calculating speed- divide distance by time
- constant speed- the speed of an object that doesnt change
- velocity- speed in a given direction
- vector quantity