As part of a circus act, a person drives a motorcycle with constant speed varound the inside of a vertical track of radius r, as indicated in Figure 647. If the combined mass of the motorcycle and rider is m, nd the normal force exerted on the motorcycle by the track at the points (a) A, (b) B, and (c) C.

Lectures 6 a nd 7 Relative Motion Motion from other p erspectives Uniform Circular Motion Speed is fixed Velocity and acceleration n ot 0 Directionally changing velocity Acceleration called “radial or centripetal” acceleration EQUATION a = v 2 c r Time it takes to complete one revolution is one “period”, T (in seconds) EQUATION v = 2πr = 1 circumference T 1 period Rotational (Angular) Rotation θis ositive g oing counterclockwise f rom p ositive xaxis (x,y) or (r, θ s coordinates arc length