can work out how far the rocket travels above the spectators' heads
based on the following information? The rocket generates a force
(F) of 20N, its mass (m) is 0.5kg and it travels for 2 seconds (t).
To work out the distance travelled, we need to calculate the velocity
and in order to do that we must first determine the acceleration.
F = ma
20 = 0.5 x a
a = 20/0.5
a = 40ms-2
Now that we
know the acceleration, let's work out the velocity:
a = v/t
40 = v/2
v = 40 x 2
v = 80ms-1
can use this information to work out the distance travelled:
v = s/t
80 = s/2
s = 80 x 2
s = 160m
So the distance
travelled by the rocked is 160m safely above the spectators' heads!