Question

A swimmer completing one trip from one bank of a river to the other and back. Is the motion periodic or not?​

Answer 1

Answer:

Non periodic

Explanation:

The motion of the swimmer is not periodic.

A periodic motion is a kind of motion, which completes all its cycle with a fixed time period. Since the swimmer has to go in one direction and then in backward there are likely chances that the time required in moving forward would not be equal to time when he comes back and complete the trip

Answer 2

The motion of the swimmer completing one trip is not periodic.

Explanation:

• When a motion is repeated in a regular time interval, then it is called as periodic motion. When a motion is repeated and it does not have regular time interval, then it is called as non-periodic motion.
• When a swimmer swims, he/she uses thrust force to move in the fluid.
• The thrust force applied maybe equal in a level water surface but not in unequal water surface.
• After sometimes, the swimmer losses some of the energy, so the swimmer takes different time to reach the one end and to reach back the starting point.