- 1K10. Dynamic Torque
- 1K10.10 Tipping Block A spring scale is used to show the least force required to overturn a cube.
- 1K10.20 Ladder Against A Wall Set a model ladder against a box and move a weight up a rung at a time.
- 1K10.30 Walking The Spool A spool can be made to move in different directions by pulling at different angles on the string attached to the hub.
- 1K10.50 Rolling Uphill A disc with a nonuniform mass distribution is placed on an incline so it rolls uphill.
- 1K20. Friction
- 1K20.10 Friction Blocks Attach a block to a spring scale with a string. Record the minimum force needed to pull the block with a constant velocity when the string is parallel to the table and then at different angles.
- 1K20.11 Tug of War Observe the relative motion of two battery operated toy cars engaged in a tug of war with and without friction, or with one car having more friction than the other.
- 1K20.13 Friction Blocks The coefficient of friction does not change for a wooden block as the speed of the sliding surface underneath it changes.
- 1K20.15 Weight Dependence Of Friction Pull a friction block with a spring scale, add weights to the first and repeat.
- 1K20.20 Area Dependence Of Friction Compare and contrast area and friction.
- 1K20.25 Phone Book Friction Interleave two phonebooks to explore how surface area effects the force of friction.
- 1K20.25 Phone Book Friction (Version 2) The instructor is suspended from interleaved sheets of copy paper pinched together with his fingers.
- 1K20.30 Static vs. Sliding Friction Displays a drop in force applied to a block after it starts sliding on a surface.
- 1K20.35 Angle Of Repose Show the effect of material on critical sliding angle.
- 1K20.40 Front And Rear Brakes A cart is rolled down an incline with either front or rear brakes locked.
- 1K20.55 Squeaky Chalk You don’t have to break chalk to eliminate squeaking, only understand friction and hold the chalk accordingly.
- 1K20.70 Falling Keys Capstan Hang a set of keys from a string draped over a pencil and when the string is released, the keys don’t hit the floor.
- 1K20.90 Air Track Friction Show there is little friction on an air track.
- 1K30. Pressure
- 1K30.10 Bed Of Nails The instructor lies on a large board with nails.
- 1K30.10 Standing On Light Bulbs Stand on a board placed on three 25 watt light bulbs in a triangular arrangement.