Questions about the chapter on uniform motion

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1. An airplane takes off at 12:15 EST from Lexington, KY and lands in Atlanta, GA at 1:30 EST. The distance from Lexington to Atlanta is 1000 kilometers. The average speed of the airplane was
133 km/hr     
666 km/hr     
679 km/hr     
800 km/hr     

2. The Law of Inertia (Newton's First Law) says
To keep something going at constant speed, you have to keep pushing on it.
For every action, there is an equal and opposite reaction
An object will move at constant velocity in the absence of external forces
Everything eventually comes to a stop.

A graph that shows where Johnny is at various times 3. Here is a graph that shows how far Johnny is from home at various times. One of the statements below can be deduced from the graph; which one?
Johnny is walking uphill
Johnny is walking at constant speed
Johnny is walking northeast
Johnny started late

4. Discussion question: From your experiences, give an example of a situation that can be explained using the Law of Inertia. Please explain the context, and make clear how your example is related to the Law.

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