Answers

2015-08-09T09:03:12+05:30
A force is a push or a pull acting upon an object as a result  of interaction with another object

gravitational force is a force that can act upon a distance from an object.gravitational force is the force of attraction between  things and the earth

frictional force is the force that opposes the motion  of an object
.slow down and stop moving objects
.prevent an object from moving
.affect the moment of abjects at different types
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2015-08-09T09:16:44+05:30
Force : the pull aor push of a body .
friction : the force acting along two surface which opposes a relative motion.
gravitational force :the pull of earth towards it 
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