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**Caturdayz** 1) A missile is shot from the ground with an initial speed of 2,500 m/s at an angle of 40 degrees. Find how high the missile reaches, the time in the air, and horizontal range.

2) If the missile was shot at a platform 3 meters above the ground, how high would the missile reach, it's time in the air? and horizontal range?

(Neglect Air Resistance)

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Velocity in the Y: Sin(40)*2500= 1606 m/s

Velocity in the X: Cos(40)*2500= 1915 m/s

Time to reach maximum height: 0=(1606)-(9.80)t= 164 seconds

Max height above cliff: (1/2)(9.8)(164)+(1606)(164)= 147846 meters

Time to fall from max height: 147846=(1/2)(9.8)t^2+0t

t^2= 2(147846)/9.8 = 30173

t= sqrt(30173)= 174 seconds

Total time in air= 174+164= 338 seconds

Horizontal Range: (1915)(338)= 647270

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Anyway, if anyone could confirm or deny the validity of the problem above I'd appreciate it, and as for the second problem... I'm not sure how to start it.