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What is Force?, - A force is a push or pull on an, object., - Forces cause an object to, accelerate., - To speed up, - To slow down, - To change direction, Scanned with CamScanner

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1) Force :-, Force is an external effort which may move a body at rest or stop, a moving body or change the speed of a moving body or change the, direction of a moving body or change the shape and size of a body., Effects of force :-, i) Force can move a body at rest., ii) Force can stop a moving body., iii) Force can change the speed of a moving body., iv) Force can change the direction of a moving body., v) Force can change the shape and size of a body., Scanned with CamScanner

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Force, Porce is the push or pull that causes a change in the motion, u. an object., moon, static, electricity, earth, gravity, (force between objects), electricity, (force of electrons), 17, magnetism, (force of the field), frietion, friction, _friction, (force opposing motion), Scanned with CamScanner

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2) Balanced and unbalanced forces :-, i) Balanced forces :-, If two forces act on a body in opposite direction and if both the forces are, equal, then the resultant force acting on the body is zero. Such forces are called, balanced forces., Balanced forces cannot change the state of rest or motion of a body., F1, F2, F, = F2, ii) Unbalanced forces :-, If two forces act on a body in opposite direction and if one force is greater, than the other, then the resultant force is not equal to zero. Such forces are called, unbalanced forces., Unbalanced forces changes the state of rest or the motion of a body., F,, F2, F, > F2, Scanned with CamScanner

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3) Force of friction :-, Force of friction is the force which opposes the motion of an object over a, surface., Eg :- A ball rolling on ground gradually slows down and, comes to a stop due to force of friction., If we stop pedalling a bicycle, it gradually slows, down and comes to a stop due to force of friction., Motion-, Pushing force,, Friction, An object with uniform motion will continue to move with uniform motion if, the forces acting on it ( pushing force and frictional force ) are balanced., If an unbalanced force acts on the moving body, then its speed or direction of, motion changes., If the unbalanced force is removed, then it will continue to move with the, speed it had acquired till then., Scanned with CamScanner