Question

An object is placed on the edge of a constant speed turntable. The object has?

• A. Constant linear velocity
• B. Tangential acceleration
• C. Centripetal acceleration
• D. Centrifugal acceleration
• E. No acceleration

Answer 1

The correct option is C Centripetal acceleration

An object placed at the edge of the constant speed turntable would also move along the point on table beneath it. Thus it would also move in a circular path. Let the distance of the point from the center of the table be $r$.

Thus a centripetal force is experienced by the object equal to $m\frac{v^2}{r}=m{a}_c$

where $v$ is the tangential speed of the point on the table, and thus of the object.