Force Notes
- A force is a push or pull
- Force gives energy to an object, sometimes causing it to start or stop moving or change the direction that the object is moving
- Measuring a spring scale or a force probe Units= Newtons (N)
- Net Force= the overall force acting on an object
- The net force is the "left over" amount when all the forces are added
- If there is a net force, the object will change its direction or velocity. This is called acceleration.
- If an object has one newton, it has the energy to move an o
- Unbalanced force- when a net force changes an object's motion
- Balanced force- equal forces acting on one object in opposite directions
-standing or sitting in a chair
Speed Notes
- Speed is the distance an object travels in a certain amount of time
- Speed is a scalar quantity- shows distance over time
- Calculating speed- divide the distance the object travels by the amount of time it takes to travel that distance
- Speed=Distance/Time
- Constant Speed: speed does not change (light travels at a constant speed)
- Average speed: the total distance divided by the total time
- Most objects don't move at constant speeds for very long.
- SPEED= DISTANCE/TIME
- Graphs can't be vertical or go backwards, but can drop down, be horizontal, or just be normal.
- Velocity: speed in a given direction (example: 15km/h east)
- Vector quantity: shows speed plus direction
- Velocity vectors: arrows pointing toward direction object is moving/accelerating
- Acceleration: change in velocity (speed with direction)