The problem that follow involve straight-line motion. The time t is in seconds unless otherwise stated.
Problem
In Active Example 13.13, suppose that the robot arm is reprogrammed so that the point P traverses the path described by
r = 1 – 0.5 sin 2πt m
θ = 0.5 – 0.2 cos 2πt rad.
What is the velocity of P in terms of polar coordinates at t = 0.8 s?
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