Unit 1 · 26 min target · activity 1 of 10

Zero velocity, nonzero acceleration

Explain that an object can be instantaneously at rest while its velocity is still changing, using a tossed ball and a second context only after the graph rule is available.

What you will be able to do

You will predict velocity and acceleration at a turning point, say which interaction is still present, and refuse the shortcut “it stopped, so a = 0.”

Assembling this screen from your local record. Nothing is lost while we wait.