Presentation on theme: "Motion, Acceleration, and Forces (chapter 3) Motion occurs as something changes position ◦ Relative motion appears according to your position ◦ Distance."— Presentation transcript:
Motion, Acceleration, and Forces (chapter 3) Motion occurs as something changes position ◦ Relative motion appears according to your position ◦ Distance is how far an object moves ◦ Displacement if the distance and direction an object changes This is known as a vector
Speed vs. velocity Speed – the distance traveled per unit time (m/s) Instantaneous speed – speed at a given point in time Average speed = total distance/total time Velocity – the speed and direction of an object
Let’s change things up…
Acceleration – an objects change in velocity Very unique label (ex. m/s 2 ) Negative acc = deceleration Acceleration = (final velocity – initial velocity) (final time – initial time)
Let’s look at a speed-time graph
Motion and Force Force is a push or pull on an object Balance forces – equal in size; opposite in direction ◦ No motion!
Unbalanced forces result in motion!
Friction – a force that opposes motion Static friction – the force to get something to move Sliding friction – the force that keeps something moving Rolling friction > sliding friction