https://padlet.com/psamphois/7r2t23bpumrl Made with a wish on a star en-us 2017-10-26 00:45:43 UTC 2017-11-27 20:19:25 UTC hello@padlet.com psamphois https://padlet.com/psamphois/7r2t23bpumrl/wish/200651110 I know that a lever is when you try to lift something up that is heavy at lift it off the ground using a contraption like a stump and a metal bar and a heavy log and using the stump as a rest to lift the log]]> 2017-10-26 00:46:31 UTC https://padlet.com/psamphois/7r2t23bpumrl/wish/200651110 psamphois https://padlet.com/psamphois/7r2t23bpumrl/wish/200651518 Levers are the simplest of all machines.
- A leer us a right bar that rotates about a Point.
- All levers have 3 main parts:
- The place where effort is applied (e)
- The fixed paint the lever rotates from called the pivot or fulcrum. (p)
- The place where the thing that is moves is located. (L)]]> 2017-10-26 00:49:20 UTC https://padlet.com/psamphois/7r2t23bpumrl/wish/200651518 psamphois https://padlet.com/psamphois/7r2t23bpumrl/wish/200655500 2017-10-26 01:13:48 UTC https://padlet.com/psamphois/7r2t23bpumrl/wish/200655500 psamphois https://padlet.com/psamphois/7r2t23bpumrl/wish/200655571 2017-10-26 01:14:10 UTC https://padlet.com/psamphois/7r2t23bpumrl/wish/200655571 psamphois https://padlet.com/psamphois/7r2t23bpumrl/wish/200655696 2017-10-26 01:14:50 UTC https://padlet.com/psamphois/7r2t23bpumrl/wish/200655696 psamphois https://padlet.com/psamphois/7r2t23bpumrl/wish/205103985 -When two surfaces rub on each other, the resulting friction causes the surface molecules to vibrate. This causes heat.]]> 2017-11-09 00:55:11 UTC https://padlet.com/psamphois/7r2t23bpumrl/wish/205103985 psamphois https://padlet.com/psamphois/7r2t23bpumrl/wish/205104741 *Oils and lubricant on metal parts help to: 
-reduce the amount of friction by allowing the parts to slide smoothly.
-absorb some of the heat produced by friction and spread it around]]> 2017-11-09 01:00:48 UTC https://padlet.com/psamphois/7r2t23bpumrl/wish/205104741 psamphois https://padlet.com/psamphois/7r2t23bpumrl/wish/205106029 -Bike Tyres come in different shapes and sizes.
-Road tyres are smooth and thin - this reduces friction and makes the tyre go across the rocky surface.

Mountain bike tyres are big, thick and have grips on them this helps with friction which allows the bike to climb up slippery surfaces like dirt or gravel.]]> 2017-11-09 01:09:55 UTC https://padlet.com/psamphois/7r2t23bpumrl/wish/205106029 psamphois https://padlet.com/psamphois/7r2t23bpumrl/wish/205106822 1. It is creating heat.
2. This stops the friction so the brakes won't work.
3. Because the molecules are rubbing together.]]> 2017-11-09 01:15:08 UTC https://padlet.com/psamphois/7r2t23bpumrl/wish/205106822 psamphois https://padlet.com/psamphois/7r2t23bpumrl/wish/207489264 2017-11-16 01:03:01 UTC https://padlet.com/psamphois/7r2t23bpumrl/wish/207489264