Set the voltage drop across the light bulbs to approximately 4 V by adjusting the knob of the power supply and the rheostat. Measure the voltage drop across and the current through the light bulb. Repeat the measurement for the other two light bulbs. Make a note on the brightness of each light bulb.

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.