The problem that follow involve straight-line motion. The time t is in seconds unless otherwise stated.
Problem
The collar A slides on the circular bar. The radial position of A (in meters) is given as a function of θ by r = 2 cos θ. At the instant shown. θ = 25° and dθ/dt = 4 rad/s. Determine the velocity of A in terms of polar coordinates.
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