Question

Beating of a drum can be termed as which of the following motion?
A. Periodic motion
B. Rectilinear motion
C. Rotatory motion
D. Circular motion

Answer 1

Hint: To answer this question, we must have a concept of all the given motion periodic motion, rectilinear motion, rotatory motion and circular motion. And then accordingly we will pick the correct option. The question is beating the drum from here. It is given that beating a drum repeatedly and so on.

Complete Step By Step Answer:
First let us understand what is rectilinear motion:
The motion of a particle that is restricted to moving in a straight line is known as rectilinear or linear motion. Only one coordinate can be used to describe such a motion. The particle's displacement, as well as its derivatives, such as velocity and acceleration, are all one-dimensional vectors. A car going along a straight path in free fall under the gravitational field of the Earth can be modelled as rectilinear motions.
So, this option is not correct.
Now, let us understand what is Rotatory motion:
Whenever a body or an object spins on its own axis, it is said to be in rotatory motion. The earth revolves around the sun on its own axis, which is an example of rotary motion. The rotation of the wheels and the steering wheel about their own axis while driving an automobile is an example of rotatory motion.
So, this option is not correct.
Now, what is Circular motion:
Circular motion is defined as the movement of an object around the circumference of a circle or the rotation of an item along a circular route in physics. It can be either uniform (with a fixed angular rate of rotation and speed) or non-uniform (with a fluctuating rate of rotation). A revolving ceiling fan, a rolling automobile wheel, and a man-made satellite orbiting the planet are all common examples.
So, this option is not correct.
Now, what is Periodic motion:
In physics, periodic motion is defined as movement that occurs at regular intervals. A rocking chair, a bouncing ball, a vibrating tuning fork, and a swing in motion, for example, all accomplish periodic motion and beating of drums.
Beating the drum is a periodic motion as we can see that we periodically beat the drums.
Hence from the above solution we can conclude that the correct option is A.

Note:
The period is the shortest span of time between repetitions of the motion. The SI unit is second, and it is symbolised by the letter t. The number of repeats per unit time is given by the reciprocal of time (t). The frequency (f) of periodic motion is the name for this quantity. Its unit is Hz, which stands for "per second." It's important to remember that while not all periodic motions are oscillatory, all oscillatory motions are periodic.