https://padlet.com/sgravit/px2z2iy8bjx Made with charisma en-us 2017-10-25 00:49:42 UTC 2018-03-12 23:07:54 UTC hello@padlet.com sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/200241313  What are they?
Levers are a simple machine. A lever is a rigid bar that rotates about a point.
All levers have 3 components:

• The Place where the force is applied (Effort Point)
• The Fixed Point the lever rotates on. (Pivot or fulcrum point)
• The load that gets moved            (Load Point)

]]> 2017-10-25 00:53:14 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/200241313 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/200243586 Examples of a class one lever:

• Scissors
• Staple Remover

]]> 2017-10-25 01:09:45 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/200243586 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/200243799 Example Of a class Two Lever:]]> 2017-10-25 01:11:12 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/200243799 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/200244457 Example of a class Three Lever:

• Human arms
• Tongs

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Friction is a force of resistance to the motion of an object.

Friction arises when the bumps on two surfaces collide.

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In machines, friction occurs when two surfaces slide or roll over each other.

Some parts of a machine are designed to overcome friction,e.g - wheels ( because they roll) Ball bearings and oiled parts.

]]> 2017-11-01 00:52:03 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/202355283 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/202356990 2017-11-01 01:06:59 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/202356990 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/202358457 2017-11-01 01:18:46 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/202358457 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/202358823 2017-11-01 01:21:06 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/202358823 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/202358945 2017-11-01 01:21:47 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/202358945 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/202358987 2017-11-01 01:21:59 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/202358987 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/202359023 2017-11-01 01:22:10 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/202359023 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/204636821 When two surfaces rub against one another, the resulting friction causes the surface molecules to vibrate. This creates heat.]]> 2017-11-08 00:44:24 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/204636821 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/204638691 Oils and lubricants on moving metals parts help to:

• Reduce  friction by allowing the parts to slide past  each other.
•  Absorb some of the heat and spread it away from the touching surfaces.

]]> 2017-11-08 00:55:47 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/204638691 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/204640970 1. What is created when two surfaces rub together?
Friction and heat.
2.What Kind of Bike tyre would suit riding in a forest? Why?
A grippy type of tyre would be useful to grip to the rough terrain. You wouldn't want to have a very smooth tyre, as you would risk slipping and ending up with injuries.
3.What would happen if you put oil on your brake pads? They would become slippery and the brakes wouldn't work.

]]> 2017-11-08 01:12:23 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/204640970 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/207489760 There are four types of friction. Sliding, Rolling, Static and Fluid]]> 2017-11-16 01:05:26 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/207489760 sgravit https://padlet.com/sgravit/px2z2iy8bjx/wish/207492912 2017-11-16 01:25:08 UTC https://padlet.com/sgravit/px2z2iy8bjx/wish/207492912