QJEEM22Phf5ba: JEE Main 2022 Physics - Class 11 JEEM22Phf5ba Solution: A ball is projected vertically upward with an initial velocity…

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QJEEM22Phf5ba: JEE Main 2022 Physics - Class 11 JEEM22Phf5ba Solution: A ball is projected vertically upward with an initial velocity…

A ball is projected vertically upward with an initial velocity of 50 ms^{$-$ 1} at t = 0s. At t = 2s, another ball is projected vertically upward with same velocity. At t = __________ s, second ball will meet the first ball (g = 10 ms^{$-$ 2}).

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Accepted Answer

At t = 2 s, v₁ = 50 $-$ 2 $\times$ 10 = 30 m/s

v₂ = v₂

$∴$ a_rel = g $-$ g = 0

$S = \frac{u^{2} - v^{2}}{2 g} = \frac{50^{2} - 30^{2}}{2 \times 10} = \frac{1600}{20} = 80$ m

$∴$ v_rel = 50 $-$ 30 = 20 m/s

$∴$ $Δ t = \frac{80}{20} = 4 s$

$∴$ required time t = 2 + 4 = 6 s

QJEEM22Phf5ba: JEE Main 2022 Physics - Class 11 JEEM22Phf5ba Solution: A ball is projected vertically upward with an initial velocity…

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