Suppose you are running with speed of 5m/s (with respect to ground, mass=20kg)
and there is a mechanism by which all of your kinetic energy is converted to electrical energy which is used to light a bulb of constant power
Case 1: 'L' who is at rest on ground reports the duration for which the bulb has glowed
Case 2: 'M' who is running opposite to you with speed 5m/s also reports the duration for which the bulb has glowed
Do both the cases have same answer???
How much amount of energy will be converted to electrical energy in both the frame??