Lift Me Up (Funky Physics Experiments)

You will need:

1. A sheet or strong thick
   cardboard or plywood
2. 6 thread reels
3. A small cardboard box
4. String (use good-quality
   string, so it doesn’t break)
5. 6 nails
6. A small weight, like a key
   or heavy screw

We all have travelled in an elevator or as we like
to call it-lift–at some point of time or the other. So,
why not make a model at home to understand
how these gravity defying boxes really work?

INSTRUCTIONS

1. Firstly take the cardboard or plywood board and attach the empty thread reels to it with the help of nails, as shown.
2. Take a small cardboard box. Keeping the open side towards you, make 2 holes each (to attach strings), at the top and the bottom.
3. Attach one string at the bottom, and the other thread at the top.
4. For the bottom, take the string and pass it over the thread reels (3 and 4) taking it up to reels 2 and 1.
5. But, loop the string twice over reel 2.
6. After passing it over 2 and 1, tie the string to one of the threads at the top of the box.
7. Take the other thread from the top of the box and pass it over reels 5 and 6, tying the other end to the small counterweight (key).
8. Turn reel 2 either way with your hands.

RESULT

Your elevator is ready. The lift will move upward or downward depending on which side reel 2 is turned. The exact same science is used in real-life elevators to transport people in buildings.