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Post on 12-Jul-2015
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SUBMITTED BY:-ARYA.RREG NO : 13971007
PHYSICAL SCIENCE
A force is an influence which tends to set
a stationary body in motion or which
tends to change the speed and direction
of a moving body or which tends to
change the shape of a body.
Contact force
Non-contact force
Balanced force
Unbalanced force
A force that can be applied only when it
is in contact with an object is called a
contact force.
Examples: muscular force, frictional
force.
A force that can be applied without any
contact between two bodies is called non-
contact force.
Examples: magnetic force, gravitational
force.
When a number of forces act on a body,
and the resultant of these forces is zero,
then the forces are said to be balanced.
When a number of forces act on a body,
and the resultant of forces is not zero,
then the forces are said to be unbalanced.
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