Passengers are driven through the double curved road shown i

Passengers are driven through the double curved road, shown in the Figure, at constant speed v. The double q curve consists of two semicircles AB and BC, both with radius R. Passengers reported feeling sudden change (jump) in sideways acceleration. (Sideways means normal to the direction of motion) At which point did passengers feel change in sideways acceleration? (Check only one box.) At points A and B only At points B and C only At points A and C only At points A, B and C

Solution

At point A, B and C

At A, the vehicle changes from rectilinear to counter clockwise, therefore sideways acceleration. At B, from counterclockwise to clockwise, therefore sideways acceleration. And at c beacuse of curvilinear to rectilinear.