Question

Which one of the following is most likely not a case of uniform circular motion? a) Motion of the Earth around the Sun. b) Motion of a toy train on a circular track. c) Motion of a racing car on a circular track. d) Motion of hours’ hand on the dial of the clock.

Answer 1

Both B and C option cannot be case of U.C.M.
as train Toy speed can depend on battery (can change)
While in option C
car doesn't follow uniform speed

Answer 2

Dear Student,

◆ Answer -

c) Motion of a racing car on a circular track.

● Explaination -

• For a racing car, speed of the car is not constant (its either accelerating or decelerating). Hence, it is not uniform circular motion.

◆ Uniform circular motion -

• Motion of a body on circumference of a circle with constant speed is called uniform circular motion.

Thanks dear. Hope this helps you...