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Dynamics - Coggle Diagram
Dynamics
Types of contact forces
Friction
Ways to enhance friction
Threads
Threads help to channel water from beneath tires, and improves the grip of tires on the road and hence reduces the chances of the vehicle skidding
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Parachute
A descending parachutist relies on the large air resistance created by the canopy of the open parachute in order to slow him down, allowing him to descend safely
Ways to reduce friction
Ball bearings
Ball bearings are small spherical balls that work like wheels, and roll around, preventing moving parts of a machine from coming into contact with and rubbing against each other directly
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Air cushion
Air cushion is the layer of air between surfaces that helps to reduce friction so that a hovercraft or a maglev train can travel faster.
Friction is a contact force that opposes motion between 2 surfaces in contact, thermal energy is produced as a result of the work done in overcoming friction
Friction is dependent on the nature of the surface, the type of material in contact and is proportional to the forces pressing on the surface altogether, but independent on contact area
Tension
Tension is the pull exerted by a stretched string, rope or wire on an object attached to it, and the direction of tension is always along the length of the string. Tension is always drawn away from the body of interest
Normal contact force
A normal is a push exerted by a surface on an object pressing on it, and the direction of normal is through the body of interest, and the normal acts perpendicular to the surface in contact
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