KinematicsMedium
Question
From a building two balls A and B are thrown such that A is thrown upward and B downwards (both vertically). If vA and vB are their respective velocities on reaching the ground, then
Options
A.vA > vB
B.vA = vB
C.vA < vB
D.their velocities depend on their masses.
Solution
As the ball moves down from height ′h′ to ground the P.E. at height′s is converted to K.E. at the ground (Applying Law of conservation of Energy).
Hence,
mAvA2 = mAghA or vA = 
;
Similarly, vB =; or vA = VB
Hence,
mAvA2 = mAghA or vA = ;Similarly, vB =
; or vA = VBCreate a free account to view solution
View Solution FreeMore Kinematics Questions
A river is flowing west east at a speed of 5 meters per minute. a man standing on the south bank of the river , capable ...In the arrangement shown in the figure the ends P and Q of an unstale string move downwards with uniform speed U. Pully ...A cricket ball, thrown across a field, is at heights of h1 and h2 above the point of projection, at time t1 and time t2 ...If x and y coordinates of a projectile as a function of time $(t)$ are given as $24t$ and $43.6t - 4.9t^{2}$, respective...A stone projected at an angle of 60o from the ground level strikes at an angle of 30o on the roof of a building of heigh...