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Force and law of motion Important questions Q1. What is force? Ans. A push or pull on a body is called force Example: Aperson push the door              A boy kick the football Q2. What is the effect of the force in object/ body Ans.2 (I) a force can move the  stationary object (II) A force can stop a moving objects (III) A force can change the speed of a moving objects (IV) A force can change the direction of a moving body. (V) A force can change the shape and size of a body Q3. Define the balance force and unbalanced force Ans3. Balance force : If the resultant of all the forces acting on a body is zero, the force is called balance force Unbalanced force: If the resultant of all the forces acting on a body is not zero ,the force are called unbalanced force Q4. Describe the Newton first law of motion Ans.4 According to the first law of motion A body at rest will remain at rest, and a body in motion will continue in motion i...