Mechanics > Rotational Dynamics > Rotational Inertia DCS# 1Q10.30

RACING DISKS

racing disks

APPARATUS
box of cylinders, hoops and spheres 202-15-E5
hinged board 202-15-D
C clamps 202-01-D6
wooden box 101 aisle
box of sand covered with cloth 101-14-E

DESCRIPTION
Roll various pairs of objects simultaneously down the inclined plane to show which ones reach the bottom first.

Roll different solid spheres to show that velocity is independent of mass and radius.

Show that velocity depends on mass distribution by rolling two non-uniform cylinders of the same mass and radius down the incline.  One cylinder has a lead core and wooden shell, the other has a wooden core and lead shell.

Race the hoop, cylinder and sphere of the same radius.

 
NOTES

Prop board on box and clamp hinged piece of metal to cart.

Place sandbox where the nonuniform cylinders will land in it and mark height from which they should be rolled.