Question:
A ball is thrown vertically up (taken as $+$ z-axis) from the ground. The correct momentum-height ( $\mathrm{p}-\mathrm{h}$ ) diagram is:
Correct Option: , 4
Solution:
(4) $v^{2}=u^{2}-2 g h$
Therefore graph between $\mathrm{p}$ and $\mathrm{h}$ cannot have straight line.
(2) and (3) are not possible.
During upward journey as $\mathrm{h}$ increases, $\mathrm{p}$ decreases and in downward journey as $\mathrm{h}$ decreases $\mathrm{p}$ increases. Therefore 4 is the correct option.
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