If ar and at represent radial and tangential acceleration, the motion of a particle will be uniform circular motion ifa) ar =0 and at =0b) ar= 0 but at is not zeroc) ar not zero , but at = 0d) ar and at are both not zero Share with your friends Share 12 The Mykey Siddharth answered this A) ar = 0 and at = 0.Have a good day..!!!! -90 View Full Answer