Question

Please solve this question.​

Answer 1

Answer:

50m/s

Explanation:

if distance traveled in 5th and 6th second are equal it means object reached its highest point at the end of the 5th second

to travel for 5 seconds upward and fall back

v=u-at

u=0+at

Answer 2

Answer:

(C) 60m/s

Explanation:

∵ Distance in 5th second = Distance in 6th second

∴ The body reached its maximum height at t=6s

time needed for whole journey = 6 x 2 = 12s

$s = ut + \frac{1}{2}at^{2} \\\\0 = 12u + \frac{1}{2}(-10)(12)^{2} \\\\u = 60ms^{-1}$