Question

Uniform circular motion is called continuously accelerated motion mainly because its :
(A) Direction of motion changes
(B) Speed remains the same
(C) Velocity remains the same
(D) Direction of motion does not change

Answer 1

Hint : If any object is moving in a circular path with an uniform speed. In other words, the uniform circular motion depends on the magnitude of velocity of the object which must be constant and the direction must change continuously.

Complete Step by step solution: An accelerating body is an object that is changing its velocity. And since velocity is a vector quantity that has both magnitude and direction, a change in both magnitude or direction leads to a change in velocity. A uniform circular motion is an accelerated motion because the direction of motion varies. So, we can say that uniform circular motion depends on the constant speed and changing direction in the same ratio.

Hence option A is correct

Additional Information: Uniform or constant acceleration is a type of motion in which the velocity of an object changes by an equal amount in every equal time period.
An often cited example of uniform acceleration is an object in free fall in the same gravitational field. The acceleration of a falling body in the absence of resistances to momentum is dependent only on the gravitational field strength g (also called acceleration due to gravity).

Note: The basic features of uniform circular motion are as follows:
Uniform circular motion is an accelerated motion.
It is a periodic motion with a definite period and frequency.
The speed of the particle remains constant but the velocity changes continuously.
The work done in one period of uniform circular motion is zero.