Question

Answer step by step​

Answer 1

Explanation:

1/2mv(f)^2+mgh(f)=1/2mv^2+mgh

And here we can cancel the mass, mm since it appears in all terms. So on earth we will have: gh(f)=1/2v^2 => 9.8⋅1.4=12v^2

v=5.2m/s

Answer 2

Explanation:

$◆ A_N_S_W_E_R ◆$

Refer to the above attachment ⬆️⬆️.