A train moves from rest with a uniform acceleration $a$ . Attaining a maximum speed $v$ it starts moving with uniform retardation $a$ . Assuming $s$ = total distance covered in the unidirectional motion of the train, its total time of journey and maximum speed are (respectively).
A train moves from rest with a uniform acceleration $a$ . Attaining a maximum speed $v$ it starts moving with uniform retardation $a$ . Assuming $s$ = total distance covered in the unidirectional motion of the train, its total time of journey and maximum speed are (respectively).
- A
$\sqrt {\frac{s}{a}},\sqrt {as}$
- B
$2 \sqrt {\frac{s}{a}},\sqrt {as}$
- C
$\sqrt {\frac{2s}{a}},\sqrt {as}$
- D
$\frac{1}{2} \sqrt {\frac{s}{a}},\sqrt {\frac{as}{2}}$
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