2006-09-27 19:56:02 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
Actually, a twist jar lid is an inclinded plane wrapped around a cylinder. We call it a "screw" but it's simpler than that.
The inclination of the two opposing planes allows you to "tighten" or "loosen" the jar top by twisting in different directions. The planes interlock, causing the lid to be pressed against the lip of the jar as you twist.
2006-09-27 20:05:52 · answer #1 · answered by jbtascam 5 · 0⤊ 0⤋
if you think, every thing is a simple machine.
you lift sugar from the pot and put it in the cup. IT IS A SIMPLE LEVER!!!.
you use a icing gun for putting icing on your cake - IT IS A SIMPLE PRESS!!
you daily walk / move your body parts - IT IS THE KINEMATIC LINKS IN MOTION, called a KINEMATIC CHAIN !!!
GOT IT ? you can think of thousand daily things like this and co-relate it to a engineering mechanism.
2006-09-27 20:06:02 · answer #2 · answered by iamgood 2 · 0⤊ 0⤋
DIE-FORMING method is used to produce lids with helical screw
( die = metal block used for pressing metals into shape )
2006-09-27 20:16:06 · answer #3 · answered by AboAyman 5 · 0⤊ 0⤋
they both tighting down the same clockwise
2006-09-27 20:03:26 · answer #4 · answered by redneckthom 1 · 0⤊ 0⤋
You're home-schooled, aren't you...
2006-09-27 20:06:15 · answer #5 · answered by MrZ 6 · 0⤊ 1⤋