Two spherical balls having equal masses with radius of $5 cm$ each are thrown upwards along the same vertical direction at an interval of $3 s$ with the same initial velocity of $35 m s^{- 1}$ , then these balls collide at a height of _____ $m$ ,
(take $g = 10 m s^{- 2}$ )

Question

Two spherical balls having equal masses with radius of $5 cm$ each are thrown upwards along the same vertical direction at an interval of $3 s$ with the same initial velocity of $35 m s^{- 1}$ , then these balls collide at a height of _____ $m$ ,

(take $g = 10 m s^{- 2}$ )

TestHub · Accepted Answer

S 1 = S 2 35 t + 1 2 ( − g ) t 2 = 35 ( t − 3 ) + 1 2 ( − g ) ( t − 3 ) 2 35 t − 1 2 g t 2 = 35 t − 35 × 3 − 1 2 g t 2 − 6 t + 9 35 × 3 + 45 = 30 t t = 150 30 = 5 height h = 35 × 5 − 1 2 × 10 × 5 2 h = 175 − 125 = 50 m

Physics - Kinematics Question with Solution | TestHub

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