Question

If ${\alpha }_r$ and ${\alpha }_t$ represent radial and tangential accelerations, the motion of a particle will be uniformly circular if

• A. ${\alpha }_r=0and{\alpha }_t=0$
• B. ${\alpha }_r=0but{\alpha }_t\ne 0$
• C. ${\alpha }_r\ne 0but{\alpha }_t=0$
• D. ${\alpha }_r\ne 0and{\alpha }_t\ne 0$

Answer 1

The correct option is C ${\alpha }_r\ne 0but{\alpha }_t=0$

In uniform circular motion tangential acceleration remains zero but magnitude of radial acceleration remains constant.