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 Change the speed and position of an object.
 Change the shape and size of an object.
Some Common Forces
 Muscular Force: The force exerted by the human body muscles is called muscular
force.
 Gravitational Force: The attractional force applied by earth on an object in downward
direction is called gravitational force.
 Frictional Force: The force which opposes the Force and Laws of Motion of an object
while being in contact with the other object, is known as frictional force.
 Air Resistance: Force which is exerted on the objects while flying in air is named as air
resistance. It acts in a direction opposite to the velocity of the object.