FORCE AND PRESSURE class 8
FORCE Q.1. Define the term force. What are its characteristics? Ans. In science, a push or a pull on an object is called a force. The fo rce always has a measure of its strength or magnitude and direction in which it is applied. So, Force is a vector quantity. The S.I. unit of Force is N (Newton). Q.2. Forces are due to an Interaction. Justify. Ans. At least two objects must interact for a force to come into play. This means whenever a force is applied on an object, three things can be easily observed: Ø agent exerting the force Ø the object on which it acts Ø the effect of the force Q.3. W...