Question

Which of the following statements is not correct in uniform circular motion? *

1.The speed of the particle remains constant

2.The acceleration always points towards the centre

3.The angular speed remains constant

4.The velocity remains constant​

Answer 1

Answer:

4

Explanation:

velocity not be in a circularotion

Answer 2

Answer:

4) The velocity remains constant.

Explanation:

A particle is said to execute uniform circular motion if it covers equal distances in equal intervals of time along a circular path of radius 'r'.

The speed and angular speed of the particle will then remain constant. The direction of acceleration will be always acting to the center of the circle.

But the velocity will never remain a constant even if the speed of the particle is a constant. The magnitude of speed and velocity are the same. But velocity is a vector quantity. So it also depends on the direction of the particle. The direction of the particle at every point on the circle will be in the direction of tangent at that point of the circle. Since the direction of the tangent of a circle at every point is different, the direction of velocity is also different at every point. So we can say that the velocity is not constant in a uniform circular motion.