Question

which of these does not show periodic motion?
a. a girl swinging
b. bob of a pendulum
c. a moving train
d. strings of a guitar ​

Answer 1

Option (c) a moving train does not show periodic motion.

Explanation:

• The type of motion in which the performed action is repeated at regular intervals of time, it is called periodic motion.
• Those objects which show uniform motion also shows periodic motion.
• Among the given examples, except a moving train, all other are periodic motion because in them the performed action is repeated at regular intervals.
• On the other hand, in the case of moving the train, the motion is rectilinear motion.
• Thus it is inferred that, among the given examples, (c) a moving train does not show periodic motion.

Learn more about periodic motion

Define the term of ‘periodic motion’. give two example of periodic motion that can be used to measure time.

https://brainly.in/question/4454879

Why is dancing considered a non periodic motion

https://brainly.in/question/9533281

Answer 2

The one that does not show the periodic motion is:

c. a moving train

• Periodic motion is the motion of a particle in equal intervals of time.

• In other words, the body in motion repeats itself continuously like repeatedly moving back and forth or moving in a circular motion.

• Here, a girl swinging shows periodic motion as the girl is swinging back and forth on a swing.

• A bob of pendulum exhibits oscillatory motion and we know that oscillatory motion is always periodic, therefore it also shows periodic motion.

• The strings of the guitar vibrate when bowed and this vibration repeats itself after a certain period of time. So it also exhibits periodic motion.

• On the other hand, a moving train shows rectilinear motion as it is moving along a straight line.