# Physics Topic: Motion in a Circle

Express angular displacement in radians.

Understand and use the concept of angular velocity to solve problems.

Recall and use

*v*=*r**w*to solve problems.Describe qualitatively motion in a curved path due to a perpendicular force, and understand the centripetal acceleration in the case of uniform motion in a circle.

Recall and use centripetal acceleration

*a*=*r**w*^{2}and*a*= v^{2}/r to solve problems.Recall and use centripetal force

*F*=*mr**w*^{2}and*F*= mv^{2}/r to solve problems.