Question

The motion of a dust particle in air is an example of -

• A. rectilinear motion
• B. curvilinear motion
• C. oscillatory motion
• D. random motion

Answer 1

The correct option is D random motion

rectilinear motion is motion in straight line.

motion of a object in curved path is curvilinear motion.

oscillatory motion can be termed as the repeated motion in which an object repeats the same movement over and over.

Brownian motion is the random motion of particles suspended in a fluid (a liquid or a gas) resulting from their collision with the fast-moving molecules in the fluid.

so dust particle is here the particle suspended in fluid(air). So motion followed is random motion.