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Distance and DisplacementQ.A runner completes one round of a circular pathof radius r in 40 seconds. His displacement after2 minutes 20 seconds will be(A) Zero(B) 2Ttr(D) 7Tur

Answer»

in 40 second he completes one circular path..so in 2 minutes 20 seconds he will complete 5 complete revolution and half revolutionso displacement=2r

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