The problem that follow involve straight-line motion. The time t is in seconds unless otherwise stated.
Problem
If θ = 1 rad and dθ/dt = 1 rad/s, what is the velocity of P relative to O?
Strategy: You can write the position of P relative to O as
s = (2 ft) cos θ + (2 ft) cos θ
and then take the derivative of this expression with respect to time to determine the velocity.
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