The problem that follow involve straight-line motion. The time t is in seconds unless othe...

The problem that follow involve straight-line motion. The time t is in seconds unless otherwise stated.

Problem

In the cam-follower mechanism, the slotted bar rotates with constant angular velocity ω = 10 rad/s and the radial position of the follower A is determined by the prolilc ol the stationary cam. The path of the follower is described by the polar equation

r = 1 + 0.5 cos 2θ ft.

Determine the velocity of the cam follower when θ = 30°

(a) in terms of polar coordinates and

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(b) in terms of cartesian coordinates.