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WEEK 4
TOPIC: FORCES
SUB-TOPIC: Friction
Meaning of Friction:
The force that tries to stop a body from moving is called friction. Friction also means force that opposes motion. Friction can be reduced by lubrication i.e. adding oil and grease placed between the two surfaces in contact. The oil and grease are called lubricants.
Protection from Friction
Friction is a force that occurs when one object moves against another. The ceramic tiles on the outside of the space shuttle protect it from the great friction caused when the shuttle re-enters Earth’s atmosphere.
Uses and advantages of friction
Disadvantages of frictions
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