Science: levers, friction and force by https://padlet.com/jberry3/xmljr75pe5vv by Bosh Berry en-us 2017-10-26 00:45:07 UTC 2026-01-05 13:43:57 UTC hello@padlet.com Prior knowledge jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/200651058 Levers:

I know that a lever can be used to lift something but it needs to be on top of something otherwise it won't be able to lever it up. The longer the lever is the easier it is to lift an object but the more likely it is to snap.

Friction:

Friction is 2 objects coming together and they may not move easily. If you put a lubricant between them they are much easier to move.

Force:

Force is when you push or put effort into moving something]]> 2017-10-26 00:46:13 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/200651058 Levers jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/200651537 Levers are the simplest of all machines.
  • A lever is a rigid bar that rotates about a point.
  • All levers have 3 main parts:

  1. The place where effort is applied.
  2. The fixed point the lever rotates from call the pivot or fulcrum.
  3. The place where the thing that is moved is located.
]]> 2017-10-26 00:49:30 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/200651537 class 1 lever jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/200654946 2017-10-26 01:10:52 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/200654946 Class 2 lever ( household items ) jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/200655057 2017-10-26 01:11:25 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/200655057 Class 1 levers (household items ) jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/200655074 2017-10-26 01:11:30 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/200655074 Class 3 levers household item. jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/200655582 2017-10-26 01:14:13 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/200655582 Simple example of class 1, 2 and 3 levers. jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/200655651 Effort, load and pivot.]]> 2017-10-26 01:14:37 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/200655651 Friction jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202749055
  • Friction is a face of resistance to the motion of an object.
  • Friction happens when two surfaces touch each other,

    • ]]>     2017-11-02 00:49:45 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202749055     Machine friction jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202749905
  • In machines, friction occurs when two surfaces slide or roll against each other.
  • some parts of a machine are designed to overcome friction. EG: wheels, ball bearings.
  • Some machines use oil to lessen friction.
    • ]]>     2017-11-02 00:55:00 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202749905     jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202751656 2017-11-02 01:05:57 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202751656 3 examples of friction on a bike jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202751687
  • Bikes show friction when the wheel rolls and meets the ground.
  • Another point of friction is the brake pads when they rub on the wheel and stop the bike from rolling.
  • Another point of friction is the chain meeting with the sprocket and every time that turns it creates friction.
    • ]]>     2017-11-02 01:06:09 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202751687     jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202752484 2017-11-02 01:11:27 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202752484 jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202752513 2017-11-02 01:11:37 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202752513 jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202752558 2017-11-02 01:11:50 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202752558 jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202752578 2017-11-02 01:11:58 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202752578 jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202752598 2017-11-02 01:12:05 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202752598 jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202752631 2017-11-02 01:12:20 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202752631 jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202752656 2017-11-02 01:12:28 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202752656 jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202752756 2017-11-02 01:12:57 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202752756 Bill Nye Friction. jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202753050 2017-11-02 01:14:53 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202753050 book challenge jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/202753240 2017-11-02 01:15:58 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/202753240 Friction and heat jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/205103860 When two surfaces rub on each other, the resulting friction causes the surface molecules to vibrate. This causes heat.]]> 2017-11-09 00:54:25 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/205103860 Lubrication jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/205104755 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 01:00:55 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/205104755     Bike tyres jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/205106022 Bike tyres come in shapes and sizes.
    Road tyres are smooth and thin- this reduces friction and makes the tyre go faster.

    Quad tyres are thick - this increases friction and that allows the quad to gain more traction.]]>     2017-11-09 01:09:53 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/205106022     Questions to answer jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/205106870 When two surfaces rub what is created? 
    When two surfaces rub heat is created.

    What would happen if you put oil on the break pads on your bike? 
    If you put oil on your break pads when you break the oil would allow it to keep spinning.

    Why is heat caused when two surfaces rub on each other. 
    Heat is caused because of surface molecules to vibrate this creates heat. The more molecules the bigger the shape is. If it is cold it still has molecules just they are moving slower than heat molecules.]]>     2017-11-09 01:15:24 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/205106870     Science reflection doc jberry3 https://padlet.com/jberry3/xmljr75pe5vv/wish/207899416 2017-11-16 20:42:21 UTC https://padlet.com/jberry3/xmljr75pe5vv/wish/207899416