Niraj Bishnoi
Last Activity: 7 Years ago
This question was raised in the Mixed-Objective type question of ETOOS. The options along with it were-
(A) 70 m/s (B) 50 m/s (C) 10 m/s (D) 49 m/s
Many people check option C) without considering the relationship between A) and D). So enough of talking let’s answer this question
u=10, v=50 in the first case
i.e v²=u²+2as
i.e 2as=2500-100=2400 ......(A)
For second case,
u=50, v=?
v²=2500+2as
=2500+2400
=4900
i.e v=sqrt(4900)
=70m/s