From the statement, since rocket was launched so this means
that it start from zero, hence initial velocity is zero.
Since the rocket was launched vertically straight up, the
force acting on this motion is gravity.
A. The acceleration of the motion is then given
by:
a= F/m - g
Then we can use the general equation:
V^2 = Vo^2 + 2*a*h
where V is final velocity, Vo is initial velocity, a is acceleration,
h is height
Since we know that Vo = 0, so
V^2 = 2*a*h
V^2 = 2 (F/m – g) h
V = sqrt [2 h (F/m – g)]
B. Given that:
h = 86 m
F = 10 N
m = 340 g = 0.34 kg
Find for V:
V = sqrt [2 * 86 (10 / 0.34 – 9.8)]
V = 58.08 m/s
