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Dont try this at home!!!

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Build Your Own Hovercraft | I Didn't Know That

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Sand is spread

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Wheels made circular

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Ball bearings

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Tyres are made rough

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Hovercraft

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There are 4 types of friction:
1. Static friction
2. Sliding or kinetic friction
3. Rolling friction
4. Fluid friction, also known as drag.

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Static friction is a force that keeps an object at rest. Static friction is defined as the friction experienced when individuals try to move a stationary object on a surface. There is no motion at the end.

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Does Static Friction exist? | Physics | Don't Memorise

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Sliding friction is defined as a force that acts between moving surfaces. A body moving on the surface experiences a force in the opposite direction of its movement. It is also called kinetic friction.

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Sliding friction when the body is moving.

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Sliding friction when the body is moving.

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Kinetic and static friction demonstration.

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Kinetic and static friction demonstration.

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North Carolina School of Science and Mathematics

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The force resisting the motion of a rolling body on a surface is known as rolling friction.

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What is Rolling Friction? | Physics | Don't Memorise

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Fluid friction describes the friction between layers of a viscous fluid that are moving relative to each other. It is also called drag.

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Streamlined bodies like birds, aeroplanes etc can overcome fluid friction.

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Fluid friction. Go through the video.

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What is Fluid Friction? | Physics | Don't Memorise