Question

When an object moves with constant
speed in a circular path, then which
of the following is false?
(A) Speed of the object is constant
(B) Velocity of the object is constant
(C) Velocity of the object changes
of
the
object
(D) Acceleration
changes​

Answer 1

Answer:

buddy answer is B

Explanation:

since direction keeps on changing in circular motion.

Answer 2

Answer:

When an object moves with constant speed in a circular path, the velocity of the object is changes.

Therefore, the statement (B) is false.

Explanation:

• Speed of any object is an scalar quantity. Speed has only magnitude but no direction of motion.
• Velocity of an object is a vector quantity. Velocity of a moving object has both direction as well as magnitude.
• When an object is moving in the straight line then its velocity vector remains constant because the object is moving only in one direction.  Therefore the velocity and speed both are same for linear motion of an object.
• But the circular motion is different. Now if the speed of an object is constant, the velocity cannot be constant. The magnitude of the velocity is same but because of the direction of the object is changing in circular path. Therefore, the velocity of an object is also changes.
• Acceleration is also a vector quantity and defined as the velocity per unit time.  Now, if velocity is changing, then acceleration of the object will change as well.

Therefore, the speed of the object can be constant during the motion in the circular path, but the velocity and acceleration will change.