Show that one ball was traveling faster than another at the start - but then at one point - they were traveling at the same speed.
Sophie is walking across the building to get to her favorite class - Science. She stops to talk to Aubree, Izzy, and Lillian. She realizes she is going to be late, so she starts to run the rest of the way.
The game has ended and everyone is heading home.
A girl went to Kings Island and walked to the front gate. She had to wait in line for a few minutes until it opened. Then she walked the rest of the way to be the first rider on the new roller coaster - Orion.
A waitress walks to a table at a constant speed. She stops at the table to grab their order. She then walks away quickly to put their order in at the computer. While putting the order in, she realizes she forgot to ask how they wanted their steak - so she quickly ran back to their table to ask.
Reference point
A zoo bus parked in the parking lot at the Zoo while it waited for the students during their field trip.
Will was walking to Science class when he realized he was late. He returned to Language Arts to get a tardy pass so he could enter Science class.
The semi traveled at a constant speed to bring the food and supplies to grocery store.
The cat laid on the ground. He got up and chased the squirrel until he ran up the tree. The cat stood at the base of the base of the tree watching the squirrel. The cat walked around the base of the tree, and then stopped to watch the squirrel again. The cat then walked away slowly because it was upset it didn't catch the squirrel.
An object (stationary or not) used for comparison that can be used to mark the relative position and movement of another object.
