Question

Which of the following real-world examples models linear motion? A. Throwing a rock in the air at a 60-degree angle B. Running around the curve of a track C. Throwing a rock in the air at a 45-degree angle D. Running 50 m along a straight track

Answer 1

Answer: the answer is D

Step-by-step explanation:

Answer 2

D. Running 50 m along a straight track

Step-by-step explanation:

Running 50 m along a straight track is a real-world example of linear motion.

Linear motion means moving along a (straight) line, a direct and straight line from point A to point B.

All the other proposed answers (A,B,C) involve a curve. The two rock examples will curve due to gravity and running around a curve on a track isn't a straight line.

I hope that helps you understanding the principle of linear motion.