Question

In circular motion, the
A Direction of motion id fixed
B Direction of motion changes continuously
C Acceleration is zero
D velocity is constant

Answer 1

This question is based on motion. First, we have to know the term motion. The motion is the change in the position of a body in a given time interval. The motion occurs when the body is under the effect of force. There are various kinds of motion such as, linear motion circular motion, oscillating and many more.

Complete step by step answer:
We know that there are various types of motion according to their position and movement. When the motion of a body is in a straight path then it is known as linear motion. Whereas, the motion is in the circular path then it is known as circular motion.

In circular motion, the body moves in a rounded path forming a circle. The direction of the body is continuously changing with respect to time. The body moves tangentially along the rounded path.

This type of motion is observed when a person moves an object tied with string and a person starts rotating the object. So, we see that the object moves in circular motion. In this circular motion, there is a force act on the object to provide a stable circular motion known as centripetal force. This force is responsible for the circular motion of the object. Centripetal force causes the change in direction of velocity.

Thus, the correct option is (B).

Note:
In this question, students must be aware of the term motion and its types. When the body is in circular motion two forces act on the object that are, centripetal force and centrifugal force. The centrifugal force is the imaginary force that acts on the object in outward direction.