1 Answer

Orlland · Answer 1 · 2023-09-21T15:29:05+0000

Answer:

t= 10 seconds

Step-by-step explanation:

Using the equation of motion with constant acceleration v=u+at

where t is time

a is acceleration of gravity

u is initial speed and f is final speed.

take the downward direction as negative

$u = 0 \\ v = - 100 (m)/(s) \\ a = - 10 \frac{m}{{s}^(2) }$

then

$- 100 = 0 - 10t \\ - 100 = - 10t \\ t = 10s$

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