A golf ball is hit at ground level. The ball is observed to reach its maximum he

Question

A golf ball is hit at ground level. The ball is observed to reach its maximum height above ground level 6.9 s after being hit. 0.67 s after reaching this maximum height, the ball is observed to barely clear a fence that is 421 ft from where it was hit. A golf ball is hit at ground level. The ball is observed to reach its maximum height above ground level 6.9 s after being hit. 0.67 s after reaching this maximum height, the ball is observed to barely clear a fence that is 421 ft from where it was hit. A golf ball is hit at ground level. The ball is observed to reach its maximum height above ground level 6.9 s after being hit. 0.67 s after reaching this maximum height, the ball is observed to barely clear a fence that is 421 ft from where it was hit.

Explanation / Answer

consider the motion along the horizontal direction

X = horizontal distance travelled = 421 ft

Vox = velocity along the horizontal direction

t = time of travel = 6.9 + 0.67 = 7.57 sec

using the formula

X = Vox t

421 = Vox (7.57)

Vox = 55.6 ft/s

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