question_answer

  Two stones are thrown vertically upwards simultaneously with their initial velocities  and  respectively. Prove that the heights reached by them would be in the ratio   of     (Assume   upward acceleration is -g and  downward acceleration to be +g).   

Answer:

                  For train A, the initial velocity, Final velocity, v = 0 and time, t = 5 s        (1) For train  (1) Speed-time graph for train A and B are shown in figure. Distance travelled by train A = Area under straight line graph RS = Area of                                         Distance travelled by train B = Area under PQ = Area