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2.Motion in Straight Line
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From a building two balls $A$ and $B$ are thrown such that $A$ is thrown upwards and $B$ downwards with the same speed (both vertically). If $v_{A}$ and $v_{B}$ are their respective velocities on reaching the ground then,
A
$v_{B} > y_{A}$
B
$v_{A} > v_{B}$
C
$v_{A}=v_{B}$
D
their velocities depend on their masses
(AIEEE-2002)
Solution
(c) ${v^2} = {u^2} + 2gh \Rightarrow v = \sqrt {{u^2} + 2gh} $
so for both the cases velocity will be equal.
Standard 11
Physics
Similar Questions
A balloon rises, up with constant net acceleration of $10\,m / s ^2$. After $2\,s$ a particle drops from the balloon. After further $2\,s$ match the following columns. (Take $\left.g=10\,m / s ^2\right)$
colum $I$ | colum $II$ |
$(A)$ Height of particle from ground | $(p)$ $0$ |
$(B)$ Speed of particle | $(q)$ $10$ SI unit |
$(C)$ Displacement of particle | $(r)$ $40$ SI unit |
$(D)$ Acceleration of particle | $(s)$ $20$ SI unit |
hard