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Newton's Laws of Motion

Two balls are...

Question

Two balls are thrown with initial velocities simultaneously at $t = 0$ . They will meet at $t =$

A

\frac{h}{u + u_{1}}

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B

\frac{2 h}{u + u_{1}}

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C

\frac{h}{u - u_{1}}

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D

\frac{2 h}{u - u_{1}}

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Solution

The correct option is A $\frac{h}{u + u_{1}}$
Relative velocity between them $= (u_{1} + u_{2})$
Relative acceleration =0
Initial separation =h
time $= \frac{h}{u + u_{1}}$

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