Ball A is thrown up vertically with speed 10m/s and at the same instant another ball B is released from rest at hieght h. At time t ,the speed of A relative to B is (a) 10m/s(b) 10-2gt(c) √10^2-2gh(d)10-gt
Khushboo , 6 Years ago
Grade 11
1 Answers
Arun
Last Activity: 6 Years ago
Dear student
V of a= 10+gt. ( Taking upward direction as +ve)
V of b= 0+(-g)t = -gt
We know that relative v = v of a- v of b
But here both the velocities are opposite to each other in directions so take one of them as -ve ( here taking v of b as -ve)