Question

PLEASE ANSWER MEANINGFUL.

DON'T POST USELESS THINGS OTHERWISE IT WOULD BE DELETED AND REPORT ED.

SO IT IS WASTE OF TIME TO POST MEANINGLESS ANSWER. ​

Answer 1

Answer:

time of ascent:v-u/a

0-100/-10

:-100/-10

10sec

then

ta=td

tmime of flight=2*10

20Sec

Answer 2

Answer:

20s (B)

Explanation:

⇒ u = 100 m/s

⇒ v = 0 m/s

⇒ g = - 10 m/s²

so , we know that ,

v = u - gt                                          (replace a with g)

t = v - u / -g

t = 0 - 100 / - 10

t = 10 seconds .

time taken to reach the ground is 10 s + 10s = 20s seconds.