Question

$\color{red}\huge\underline{\underline{Question:}}$

$\mathbf{Solve\:it}$​

Answer 1

Answer:

HEY! THE ANSWER IS 1)122.5 ,2)10S

#SOLUTION :-

$v {}^{2} = u { }^{2} + 2as$

$0 = 49 {}^{2} - 2(9.8)(s)$

$s = 122.5ms { }^{ - 1}$

v =u+at

0=49-9.8t

t=5s

total time =10s.

HOPE IT HELPS :)

Answer 2

Hi there!

Your Answers :-

$\large\tt\underline\blue{Given\to}$

Initial Velocity = 49m/s

Velocity = 0

$\large\tt\underline\blue{Solution\to}$

$\bf\green{{v}^{2} - {u}^{2} = 2aH}$

$\bf\red{0 - {49}^{2} = 2 \times 9.8 \times H}$

$\bf\gray{H = 122.5 \: m}$

Using First Equation Of Motion.

$\bf\pink{v = u + at}$

$\bf\orange{0 = 49 - 9.8t}$

$\bf{t = 5 \: s}$

So, Time For Returning The Ball=2t=10s.

So, Your answers are 125m and 10 sec.