Topics: Mechanics - Gravity
Equipment: Torsion balance apparatus, large metal spheres, mounted laser.
Setup: Place the larger balls into the proper holes, and keep the apparatus perfectly steady. Use the laser beam to reflect off the mirror and onto some easy viewing screen, to observe the displacement.
Location: Shelf B-h6
Notes: The apparatus is ridiculously sensitive, so much so that it hardly shows the effect it is supposed to demonstrate- outside interference such as rumbling from trains, people walking nearby, and even air vents is more than enough to deflect the mirror.
Keywords: Gravity, Reflect, Laser, Ball, Pull