Question

Water drops fall from the nozzle of a tap at height 180 m.The drops fall at regular intervals of time. The first drop strikes the floor at the instant when seventh drop begins to fall. The time interval between two consecutive drops is $\left(g=10m{s}^{-2}\right)$

• A. 4/5 s
• B. 6/7 s
• C. 1 s
• D. 8/9 s

Answer 1

The correct option is C 1 s

$\text{time taken by 1 drop to reach ground}$

$S=ut+\frac{1}{2}g{t}^2$

$180=0+\frac{1}{2}10\times t^2$

$t=6sec$

in mean while 6 drops emergs.

so time for consecutive drop is

$T=\frac{6}{6}=1sec\text{Answer:}\left(C\right)$