MCQ
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$\sqrt {\frac{s}{a}},\sqrt {as}$
- ✓$2 \sqrt {\frac{s}{a}},\sqrt {as}$
- C$\sqrt {\frac{2s}{a}},\sqrt {as}$
- D$\frac{1}{2} \sqrt {\frac{s}{a}},\sqrt {\frac{as}{2}}$
