A truck is moving on the horizontal road with constant speed $v.$  A ball is thrown from the truck vertical up at speed  $u$  $w.r.t.$  truck. What is distance traversed by the truck when ball returns on the truck

  • A

    $\frac {uv}{g}$

  • B

    $\frac {2uv}{g}$

  • C

    $\frac {3uv}{g}$

  • D

    $\frac {uv}{2g}$

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Given below are two statements. One is labelled as Assertion $A$ and the other is labelled as Reason $R$.

Assertion A :Two identical balls $A$ and $B$ thrown with same velocity '$u$ ' at two different angles with horizontal attained the same range $R$. If $A$ and $B$ reached the maximum height $h_{1}$ and $h_{2}$ respectively, then $R =4 \sqrt{ h _{1} h _{2}}$

Reason R: Product of said heights.

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