Please explain this question step by step direction adopted for the equation. Th

Question

Please explain this question step by step

direction adopted for the equation. Then put in numbers and solve for unknowns. A boy tosses a ball in the vertical direction off the side of a cliff. If the initial velocity VA of the ball is upward, and the ball is released h from the bottom of the cliff, determine the maximum height SB reached by the ball and the speed of the ball just before it hits the ground. During the entire time the ball is in motion, it is subjected to a constant downward acceleration g due to gravity. Neglect the effect of air resistance. VA = 18 m/s h = 48 m

Explanation / Answer

maximum height = 48 + (18*18/2*96.8) = 64.5 m

energy =conservation

0.5*m*18*18 + m*9.8*48 = 0.5 m* v^2

V = 35.56 m/s

total time =t

V-u = a*t

so

35.56-(-18)= 9.8*t

t=5.465 sec

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