Abob of mass m is suspended from a fixed point with a massless string of length l (i. e., it is a pendulum). you are to investigate the motion in which the string moves in a cone with half-angle θ. what tangential speed, v , must the bob have so that it moves in a horizontal circle with the string always making an angle θ from the vertical? express your answer in terms of some or all of the variables m, l, and θ, as well as the acceleration due to gravity g. v = lsin(θ) / sqrt(lcos(θ) / g)v = lsin(θ) / sqrt(lcos(θ) / g)