Use a(t) = -32 ft/sec2 as the acceleration due to gravity. (Neglect air resistance.)

With what initial velocity must an object be thrown upward (from ground level) to reach the top of a national monument (520 feet)? (Round your answer to three decimal places.)

Question

Use a(t) = -32 ft/sec2 as the acceleration due to gravity. (Neglect air resistance.)

With what initial velocity must an object be thrown upward (from ground level) to reach the top of a national monument (520 feet)? (Round your answer to three decimal places.)

anonymous · Answer

well, as the motion is relatively one dimensional.. v(square) - u(square) = 2 a d.
v is zero at the top of the height. hence, -u(square) = 2 a d.
since a is negative.. u(Square) = 2 (magnitude)a d
so initial velocity is root[ 2 (magnitude)a d]

anonymous · Answer

so answer is 182.428 feet per second