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6. (a) What minimum initial velocity must a projectile have to reach a target 90 km away? (b) What would the time of flight be?​

User Qasim Khan
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1 Answer

4 votes

Answer:

See below

Step-by-step explanation:

45 degree angle will produce the minimal velocity and maximum range...

Maximum range formula= v^2 / g

90 000 m = v^2 / 9.81 m/s^2

v = 939.6 m/s

Time would be calculated by using the horizontal component and the horizontal speed

90 000m / ( 939.6 m/s cos 45 m/s ) = 135.5 s

User Nilesh Kevlani
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