1. What is Motion?
Motion: A change in position of an object compared to a reference point
Motion can be measured in the following ways:

2. Speed The distance traveled by an object in a given amount of time.
Speed= Distance
time
Image: Definition:

4. Velocity
Speed + Direction
Velocity = Distance
time

5. Or change in velocity.

6. Calculating Acceleration
Force = mass x acceleration
F = ma F m a

7. Practice
What net force is required to accelerate a car at a rate of 2 m/s2 if a car has a mass of 3,000 kg?
What is the mass of a falling rock if it produces a force of 147 N (hint: gravity accelerates at 9.8 m/s2)?
What is the acceleration of a softball if it has a mass of .5 kg and hits the catcher’s glove with a force of 25 N?