Sven and his friends build a human sized sling shot. They convince their friend Lars
to step in the slingshot to see how far he
goes. Graph the first 3 seconds of Lars's
flight.

there are no correct statementd on the list of choices you provided.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.