Physics Multiple choice?
what altitude from the launching point does a model rocket reach if its rocket fires for 5 seconds, accelerating the rocket at a constant 50m/s^2?
A) 10 m
B) 125 m
C) 250 m
D) 625 m
E) 875 m
Please explain why! The help is appreciated!
Answers & Comments
Verified answer
Assuming rocket goes vertically upward and there is no change in mass dew to fuel combustion.
initial velocity u=0m/s;
acceleration a=50m/s²(assuming it includes gravitational drag force)
time t=5s
distance s1
using s=ut+1/2at²
s1=1/2*50*25
=625m
so answer is D.