Question

Помогите решить задачи

Answer 1

(1)
v = v0 + gt
$s = \frac{gt ^{2} }{2}$
$t = \sqrt{ \frac{2s}{g} }$
$t = \sqrt{ \frac{9}{10} } = 0.9c$
v = 15 + 10 * 0,9 = 24 m \ c