Question

Justify the answer:
An object can be moving with Uniform speed but variable acceleration

Answer 1

Yes, if the body maintains the same speed but changes its direction continuously then it is said to have variable acceleration.

Ex-in case of circular motion the body is at unform speed but its accelerating.^.^

Answer 2

Answer:

Answer:

In uniform circular motion the speed of the object remain constant but its acceleration changes at every point.

Explanation:

• Uniform circular motion: If an object moves in a circular path with constant speed then the motion is called uniform circular motion.
• In this type of motion speed is uniform but the direction of the object changes along the path.
• Acceleration for uniform circular motion = $\frac{v^2}{r}$ .

       Where v is the velocity and r is the radius of circular path.

       As acceleration depends on velocity and velocity is a vector

       quantity. So acceleration depends on the direction.

• As direction along the circular path is not constant in case of uniform circular motion, the acceleration will not be constant.
• That's why in uniform circular motion acceleration is variable although speed is constant.