https://padlet.com/jwells17/k09d79m2ztq8 Made with ♥ en-us 2017-10-26 00:45:22 UTC 2023-08-24 17:13:29 UTC hello@padlet.com jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/200651109 There are levers on the handle bar of a bike to use the brakes. A lever is a firm bar that Rotates up and down about a point. ]]> 2017-10-26 00:46:29 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/200651109 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/200651389 Levers are the simplest of all machines.
- A lever is a rigid bar that rotates about a point.

- All levers have 3 Main points:
- The place where effort is       applied.
- The fixed point the lever rotates from called the pivot or fulcrum.  - The place where the thing is moved is located. ]]> 2017-10-26 00:48:25 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/200651389 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/200654941 Example: ]]> 2017-10-26 01:10:51 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/200654941 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/200655039 Example: 

]]> 2017-10-26 01:11:19 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/200655039 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/200655335 Example: 

]]> 2017-10-26 01:12:51 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/200655335 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/200655706 2017-10-26 01:14:53 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/200655706 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/200655954 2017-10-26 01:15:56 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/200655954 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/200656178 2017-10-26 01:17:02 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/200656178 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/200657536 2017-10-26 01:23:30 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/200657536 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/202749723 - Friction is a force of resistance  to the motion of an object. 

- Friction happens when two surfaces touch each other. 

]]> 2017-11-02 00:54:08 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/202749723 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/202749943 - 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 lessen friction. ]]> 2017-11-02 00:55:15 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/202749943 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/202750472 - Brakes use friction to slow down the wheel. 

- When the chain rubs with the other objects to make the wheel spin.

-When the two surfaces meet meaning Wheel and Ground.

]]> 2017-11-02 00:58:46 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/202750472 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/202750811 2017-11-02 01:01:01 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/202750811 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/202750814 2017-11-02 01:01:02 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/202750814 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/202750819 2017-11-02 01:01:04 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/202750819 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/202750822 2017-11-02 01:01:05 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/202750822 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/202750836 2017-11-02 01:01:13 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/202750836 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/202750990 2017-11-02 01:02:15 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/202750990 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/202753043 2017-11-02 01:14:49 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/202753043 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/205103936 when two surfaces rub on each other, the resulting friction causes the surface molecules to vibrate this causes heat. ]]> 2017-11-09 00:54:53 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/205103936 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/205104794 -( oils and lubricant on metal helps to: )
- reduce the amount of friction by allowing the parts to side smoothly. 
- absorb some of the heat produced by friction and spread it around. ]]> 2017-11-09 01:01:15 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/205104794 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/205105953 Bike Tyre's come in different shapes and size's.

Road Tyre's are smooth and thin - this reduces friction and makes the Tyre go faster.

Mountain bike Tyre's are large and thick.
This increases friction and that allows the bike to stay put on the ground. ]]> 2017-11-09 01:09:28 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/205105953 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/205107712 When two surfaces rub what is created? Heat or friction.

What would happen if you put oil on your brake pads of your bike? It would slip and wont cause friction. Or the brake pads won't work.

Why is heat caused when two surfaces rub on each other? Heat is caused when two surfaces rub because the molecules vibrate and shoot up to the surface. ]]> 2017-11-09 01:19:57 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/205107712 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/207489275 2017-11-16 01:03:06 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/207489275 jwells17 https://padlet.com/jwells17/k09d79m2ztq8/wish/207489805 Rolling: the wheels on a bike roll down hills

Sliding: boxes can slide down steep hills.

Static: Static friction is the force required to make an object at rest begin to move

Fluid.: describes the friction between layers of a vicious fluid that are moving relative to each other.]]> 2017-11-16 01:05:48 UTC https://padlet.com/jwells17/k09d79m2ztq8/wish/207489805