★★★★
A+0+35 A ball swung on a string held by a sleeve.
A+5+20 Bowling ball pendulum swings back to nose.
A+12+0 Blocks, with various surfaces slide on an inclined plane.
A+14+0 Weight on a vertical spring with markers on stand.
A+25+0 Two disks, one weighted in center and other on rim, roll down ramp.
A+30+15 Rotating chair with dumbbells or weighted bicycle wheel.
A+35+10 Elastic collisions: Five hanging balls and two unequal hanging balls.
A+35+20 Three meter airtrack with gliders that rebound elastically, or stick.
A+50+0 Dropped and shot balls hit bench simultaneously.
A+50+10 The Hunter
A+50+35 Ballistics car: Ball ejected from rolling car drops back in.
A+55+5 Rolling spool: String on spool is pulled at various angles.
B+10+0 Mass on a spring.
D+0+28 Energy storage in a commercial capacitor. Loud bang!
D+10+6 Attraction and repulsion of charged styrofoam balls.
D+10+12 Charge resides on the outside of a conductor.
D+35+1 Inverter Magnet
A+5+20 Bowling ball pendulum swings back to nose.
A+12+0 Blocks, with various surfaces slide on an inclined plane.
A+14+0 Weight on a vertical spring with markers on stand.
A+25+0 Two disks, one weighted in center and other on rim, roll down ramp.
A+30+15 Rotating chair with dumbbells or weighted bicycle wheel.
A+35+10 Elastic collisions: Five hanging balls and two unequal hanging balls.
A+35+20 Three meter airtrack with gliders that rebound elastically, or stick.
A+50+0 Dropped and shot balls hit bench simultaneously.
A+50+10 The Hunter
A+50+35 Ballistics car: Ball ejected from rolling car drops back in.
A+55+5 Rolling spool: String on spool is pulled at various angles.
B+10+0 Mass on a spring.
D+0+28 Energy storage in a commercial capacitor. Loud bang!
D+10+6 Attraction and repulsion of charged styrofoam balls.
D+10+12 Charge resides on the outside of a conductor.
D+35+1 Inverter Magnet