Question

Parthiv moves on a straight road from point A to point C. He takes 20 minutes to cover a certain distance AB and 30 minutes to cover the rest of distance BC. He then turns back and takes 30 minutes to cover the distance CB and 20 minutes to cover the rest of the distance to his starting point. He makes 5 rounds on the road the same way. Parthiv concludes that his motion is
2 points
Only rectilinear motion.
Only periodic motion.
Rectilinear and periodic both.
Neither rectilinear nor periodic.​

Answer 1

Answer:

Rectilinear and periodic both.

Parthiv is moving along a straight line with a fixed time period and returns to the starting point again. So her motion is both rectilinear and periodic.