Question

What type of motion do the following objects have?
A) A galloping of a horse.
B) The needle of a sewing machine.
C) A flying mosquito.
D) The blades of an electric fan.
E) The wheels of a moving car.

Answer 1

Hint: The type of motion of an object is determined by how the body is moving from one point to another. If a body is moving in a plane it is called linear motion, if the body is moving in a circle it is called circular motion and if the body is vibrating about a point it is called a vibratory motion of periodic motion.

Complete step by step answer:
A galloping of a horse – In galloping of a horse, the horse is running in a plane so galloping of a horse is a kind of linear motion.
The needle of a sewing machine- A periodic motion is defined when the body comes back to its initial position after a certain interval of time, in a sewing machine, the needle of the sewing machine is moving back and forth or up and down from its mean position, so the needle of the sewing machine is in periodic motion.
A flying mosquito- the mosquito flies in the air here and there just like atoms of a gas molecule moving inside the container in Brownian motion, similar analogy can be seen if we assume the mosquito as an atom inside the container or inside the room. So, a flying mosquito is in Brownian motion or random motion.
The blades of an electric fan- The blades of a running electric fan are fixed to the rotor of the fan, as the rotor rotates the blades of the fan also rotate with it in a circular path, Hence the blades of an electric fan are in a circular motion.
The wheels of moving car- the whole car or any other vehicle rests on its wheel, if the car is in the parking lot it is at rest when we drive the car or any other vehicle the wheels rotates along a fixed axis, and the car moves forward or backward motion depending upon the gear which we have applied to the vehicle since the wheels are also the part of the car/vehicle it also will move forward and backward as the car/vehicle moves, hence the wheels of a moving car are in both rotational motion as well as the linear motion.

Note:
The motion of a body can be determined by the path followed by it or a point on the body itself.
The path followed by a point on the wheels of a moving car is called cycloid.
The path followed by the tip of the needle is periodic in nature.
The path followed by a point on the blades of a moving fan is circular in nature.