Question

Which one is an example of non-uniform motion?

• A. An aeroplane flying at -$300km{h}^{-1}$
• B. Water falling from a water fall
• C. Earth going around the sun
• D. None of the above

Answer 1

The correct option is B

Water falling from a water fall

Explanation for correct option:

B: Water falling from a waterfall

1. A free-fall motion is an example of non-uniform motion.
2. This is so because when a body is dropped its velocity keeps increasing due to the acceleration due to gravity.

Explanation for incorrect option(s):

A: An aeroplane flying at -$300km{h}^{-1}$

1. In that speed is constant.
2. So this is a type of uniform motion.

C: Earth going around the sun

1. If the orbit of the earth is circular in shape, then the motion of the earth would be uniform and constant in nature.

Hence, the correct answer is (B).