Define force and write its SI unit
Force is a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object. It causes objects to accelerate. SI unit is Newton.
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Force can bring about following impacts on a body:
1. Change the speed of a moving body
2. Change the direction of the moving body
3. Move an object from rest
4. Change the shape of a body