A particle rotates in U.C.M. with tangential velocity 'v' along a horizontal circle of diameter 'D'?

... Total angular displacement of tha particle in time t is.......? or:... Total angular displacement of tha particle in time 't' is.......?

... Total angular displacement of tha particle in time 't' is.......?

or:... Total angular displacement of tha particle in time 't' is.......?

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