Definitions (Force)
FORCE
Force: it is defined as a pull or push that changes
or tries to change the state of rest or uniform motion of a body in straight
line.
Gravitation: The mutual force of attraction between any two bodies in this
universe is called gravitation.
Universal Gravitational Constant: It is defined as the force of attraction
between any two unit masses separated by unit distance.
Gravity: It is the force by which a body is attracted towards the center of earth or any other heavenly body.
Acceleration due to gravity: It is defined as the acceleration
produced in freely falling body.
Conclusion of Guinea and feather Experiment: It confirms that “acceleration due to gravity of freely falling bodies, whatever their masses are same in the absence of air resistance.”
Gravitational field: It is defined as the region around the
heavenly body upto which its gravitational force is experienced other body.
Gravitational Field Intensity: Gravitational field
intensity at a point is defined as the force experienced by unit mass placed in
a gravitational field.
Mass: The
quantity of matter contained in a body is called mass.
Weightlessness: It is the condition of the body when its
weight seems to be zero.
Free-fall: When a body falling freely towards the center of earth under the
influence of gravity of the earth, the motion o body is called free-fall.
Null point: The point in the space where the value of acceleration due to
gravity is zero.
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