Question

A body is revolving with a uniform speed 'v' in a circle of radius 'r'.The tangential acceleration is:

• A. $\frac{v}{r}$
• B. $\frac{v^2}{r}$
• C. $\frac{v}{r^2}$
• D. zero

Answer 1

The correct option is D zero

when a body is revolving around a circular path, it experiences 2 forces: Centrifugal force and Centripetal Force.
Centrifugal force (Latin for "center fleeing") describes the tendency of an object following a curved path to fly outwards, away from the center of the curve. It's not really a force; it results from inertia — the tendency of an object to resist any change in its state of rest or motion.
Centripetal force is a real force that counteracts the centrifugal force and prevents the object from "flying out," keeping it moving instead with a uniform speed along a circular path.
Centripetal force: $Fc=\frac{m{v}^2}{r}$
Where as tangential force $F_t=0⟹a_t=0$
correct option is option D