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How far horizontally has the Rocket traveled after 1 minute? Round your answer to the nearest meter.

A rocket has been fired at a 45-degree angle for 3.5 seconds. The rocket travelled in a straight line at a speed of 125m/second. 
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1 Answer

v0 = launch speed
 
θ = launch angle above horizontal
 
t = time [In the problem you give two times, 1 min and 3.5 sec.  I will solve it for 3.5 sec, you do do the other.]
 
x(t) = horizontal distance traveled in time t
 
Neglecting air resistance,
 
x(t) = (v0cosθ)t = (125 m/s)(cos45°)(3.5 s) ≅ 309 m
 
Plug in t = 60 sec for the other case.