EducatorSharmin

  Physics Work, Power & Energy Q.1. What is work? Measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. If a force F is applied on any object and the object transverses a distance S during the application of force then, the amount of work W done by the force is:                                   W = FS Unit of work  = J Dimension of work [ W]  =  ML² T¯² Q.2. What is power? Ans: Power is the rate of doing work. If work W is done in time t, then power P is: P = W/t Unit of power:   W (Watt) Dimention of power [ P] = ML² T¯³ Mechanical Energy: The energy that is obtained due to position shape and motion of the object is called mechanical energy. There are two forms of mechanical energy: These are - 1. Kinetic 2. Potential    Kinetic energy: The...