A television commercial for a new camera features a handsome man taking photographs of beautiful women in bikinis on a California beach. This commercial uses conditioning techniques, following an approach to advertising that was pioneered by .

Which of the following is a true statement about the acceleration ~a of the pendulum bob ~a is equal to the acceleration due to gravity. ~a is perpendicular to the bob’s trajectory. ~a is equal to the instantaneous rate of change in velocity. ~a is tangent to the bob’s trajectory.