question_answer

                 Define energy. What are different forms of energy? A 150 kg car engine develops 500 W for each kg. What force does it exert in moving the car at speed of 20 ?

Answer:

                                 Energy It is defined as the ability to do work. The different forms of energy are                          (i) Kinetic energy              (ii) Potential energy (iii) Chemical energy       (iv) Heat energy (v) Light energy                (vi) Sound energy (vii) Electrical energy  (viii) Nuclear energy          A car engine 150 kg develops 500 W for each kg. Total power = 150 x 500 = 75000 W We have, Power = Force x Speed 75000 = Force x 20 Force,