Question

$try to answer them$
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Answer 1

Answer:

39.2-1

Explanation:

answerrr is this

Answer 2

Answer:

Let the velocity be u.

It's vertical velocity is zero. After 4s it will be

$= u + gt = 0 + 9.8 \times 4 = 39.2 \: m {s}^{ - 1}$

But horizontal will be same as projection . Since angle is 45. so both will be same.

$\frac{ u}{39.2} = \tan(45) = 1 \\ \\ u = 39.2 \: m {s}^{ - 1}$