https://padlet.com/tkuiti/8z1tfpfe01e9 en-us 2017-10-26 00:45:21 UTC 2025-12-18 14:59:35 UTC hello@padlet.com tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200651113 - Force is when you put pressure on someone or something.
- Levers is something you use to help lift something or shift something.]]> 2017-10-26 00:46:32 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200651113 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200651309 Levers are the simplest of all machines:
- A lever is a rigid bar that rotates about a point.
- All levers have three main points:
1. The place where effort is applied.
2. The fixed point where the lever rotates from is called the pivot.
3. The place where the thing that is moved is located.]]> 2017-10-26 00:47:53 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200651309 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200655329 2017-10-26 01:12:49 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200655329 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200655360 In a Class One Lever, the Fulcrum is located between the Load and the Force. The closer the Load is to the Fulcrum, the easier it is to lift (increased mechanical advantage). Examples include see-saws, crow bars, hammer claws, scissors, pliers, and boat oars.]]> 2017-10-26 01:12:58 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200655360 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200655758 2017-10-26 01:15:07 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200655758 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200655788 In a Class Two Lever, the Load is between the Force and the Fulcrum. The closer the Load is to the Fulcrum, the easier the load is to lift. Examples include wheelbarrows, staplers, bottle openers, nut cracker, and nail clippers.]]> 2017-10-26 01:15:13 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200655788 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200656183 2017-10-26 01:17:04 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200656183 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200656208 In a Class Three Lever, the Force is between the Load and the Fulcrum. If the Force is closer to the Load, it would be easier to lift and a mechanical advantage. Examples are shovels, fishing rods, human arms and legs, tweezers, and ice tongs.]]> 2017-10-26 01:17:10 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200656208 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200656689 2017-10-26 01:19:38 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200656689 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200656779 2017-10-26 01:19:58 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200656779 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200656896 2017-10-26 01:20:16 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/200656896 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202748884 - Friction is a force of resistance to the motion of an object.
- Friction happens when two surfaces touch each other.]]> 2017-11-02 00:48:33 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202748884 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202749144 - In machines, friction occurs where two surfaces slide or roll on each other.
- Some parts of a machine are designed to overcome friction.  Eg - Wheels, Ball Bearings.
- Some machines use oil to reduce friction.]]> 2017-11-02 00:50:18 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202749144 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202750546 2017-11-02 00:59:16 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202750546 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202751610 1. Where the chain rubs against the sprocket.
2. When the brakes push on the wheel rims.
3. When you grip your hands the the handles.]]> 2017-11-02 01:05:37 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202751610 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753057 2017-11-02 01:14:55 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753057 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753113 2017-11-02 01:15:19 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753113 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753174 2017-11-02 01:15:37 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753174 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753241 2017-11-02 01:15:58 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753241 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753478 2017-11-02 01:17:25 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753478 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753837 2017-11-02 01:19:25 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/202753837 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/205103903 - When two surfaces rub on each other, the resulting friction causes the surface molecules to vibrate. This causes heat]]> 2017-11-09 00:54:40 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/205103903 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/205104754 - Oils and lubricant on metal parts help to:
1. Reduce the amount of friction by allowing the parts to slide smoothly.
2. Absorb some of the heat produced by friction and spread it around.]]> 2017-11-09 01:00:54 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/205104754 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/205106009 - Bike tyres come in different shapes and sizes.
- Road tyres are smooth and thin - this reduces friction and makes the tyre go faster.
- Mountain bike tyres are big and bulky.  This increases friction and that allows the bike to stick to the ground.]]> 2017-11-09 01:09:47 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/205106009 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/205107703 1.  When two surfaces rub what is created?  Heat is created.
2.  What would happen if you put oil on the break pads of a bike? If you put oil on break pads of a bike it will lessen friction and won't break.
3.  Why is heat caused when two surfaces rub on each other?  Heat is caused when two surfaces rub on each other because the molecules vibrate and shoot up to the surface.]]> 2017-11-09 01:19:52 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/205107703 tkuiti https://padlet.com/tkuiti/8z1tfpfe01e9/wish/207491034 2017-11-16 01:13:54 UTC https://padlet.com/tkuiti/8z1tfpfe01e9/wish/207491034