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A car moving around a tree has the distance from the tree defined as r = 5t^2 + 7. What is the magnitude of the centripetal acceleration at t = 2s, if the angular velocity is 2 rad/s.(a) 102(b) 108(c) 59(d) 54I got this question in exam.Query is from Non-Uniform Circular Motion in division Laws of Motion of Physics – Class 11

Answer»

Right option is (b) 108

For explanation: The centripetal acceleration is GIVEN as AC = rω^2. Here, we have r = 5t^2 + 7 = 27 units at t = 2s. Angular velocity is 2 rad/s. On substituting all the values, we GET, the acceleration as 108 units/s^2.



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