Answer to Question #317747 in Classical Mechanics for Johannes Steven

Question #317747

A university graduate standing on the ground fires a rocket into the atmosphere at a velocity of 4000 m/s at an angle of 20o to the vertical axis. Determine (g = 9.8 m/s2):

(a) The time of flight (3) (b) The maximum level


1
Expert's answer
2022-03-25T09:11:21-0400

(a) the time of flight

"t=\\frac{2v_0\\sin\\theta}{g}"

"t=\\frac{2\\times 4000\\times \\sin70^\\circ}{9.8}=767\\:\\rm s"

(b) the maximum level

"H_{\\max}=\\frac{v_0^2\\sin^2\\theta}{2g}"

"H_{\\max}=\\frac{ 4000^2\\times \\sin^270^\\circ}{2\\times9.8}=7.2\\times 10^5\\:\\rm m"


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