Question

Which of the following is not in uniform motion?

• A. A bullet travelling with a constant speed in a straight line.
• B. A swinging pendulum
• C. The earth rotating about its axis
• D. Both B & C

Answer 1

Answer: (B)

$A-$As the bullet has a constant speed and is travelling in a straight line, so it will have a constant velocity and hence it is in uniform motion

$B-$A swinging pendulum is under the action of gravitational force and is also changing its direction, hence it is not in uniform motion.

$C-$The rotation of the earth in non accelerated motion and hence it is a uniform motion

Hence, correct answer is option $B$