Physics: Chapter 5- Exploring Forces
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7 Terms
Force
A push or a pull on an object resulting from the object’s interaction with another object. SI Unit: N (newtons).
Contact forces
Forces that act only when there is physical contact between the objects. Eg: Muscular force, Friction.
Non-Contact Forces
Forces whose effect can be experienced even if the objects are not in contact. Eg: Magnetic Force, Electrostatic Force, Gravitational Force.
Weight
The force with which the Earth pulls an object towards itself. SI Unit: N, can be measured using a spring balance.
Mass
The amount of matter an object has. SI Unit: Gram (g).
Buoyant force/Upthrust
The force applied by a liquid on an object in the upward direction.
Archimedes’ Principle
It states that when an object is partially/fully immersed in a liquid, it experiences an upward force which is equal to the weight of the water it displaces.