Motion Definition Speed A change in position over time Measures the rate of motion (how fast something is going) Speed = distance (miles, km, m, in, cm, etc.) time (hr, min, s, day, yr, etc.)

In order to tell if something is moving you have to look at its “frame of reference”. From our frame of reference, Goddard is not moving. From Mars’ frame of reference, Goddard is moving.

If the question asks for… “how fast” or “how slow”, then it wants you to find _______________ “how far”, then it wants you to find ______________ “how long did it take”, then it wants you to find ______

The Magic Triangle D S x T

Speed vs. Velocity Velocity To calculate velocity is speed with the direction of the motion on the end ex. of speed is 3 miles per hour ex. of velocity is 3 miles per hour south 1. Velocity = Displacement Time 2. Include the direction the object ended up going

Distance Displacement How far you go from start to finish – Total distance traveled The shortest distance from start to finish – Distance away – Has a direction

Explain what you see.