Black-and-white scientific diagram of a simple pendulum experiment with labeled components like bob, string, photogate, and timer.

Create a black-and-white scientific textbook illustration of a simple pendulum experiment. Show a fixed horizontal support at the top with a light, inextensible string hanging down. At the bottom of the string is a circular bob (the pendulum mass). The bob should be drawn in two positions: at rest vertically, and displaced to the side at an angle θ. Include a protractor arc near the pivot to measure the initial angle θ. At the bottom of the swing path, illustrate a photogate sensor positioned to detect when the bob passes through, connected to a timer box. Label all parts clearly (fixed support, string, bob, angle θ, protractor, photogate, timer). Use simple black-and-white line art, minimal shading, clean labels in empty space with leader lines, in the style of a physics textbook diagram. See more