Question

A putting green islocated 150 feet horizontally and 45 feet vertically from the tee. What must be the magnitude and direction of the initial velocity if a ball is to strike the green at this location after a time of 2.4 seconds? nitial Velocity MagnitudeNmber feetsecond Initial Velocity Angle Number degrees

Answer 1

considering motion along horizontal

R = u cos x * t

u cos x = 150 / 2.4

u cos x = 62.5 ... (i)

Considering motion along vertical

h = u sin x* t - 0.5 gt^2

45 = + u sin x * 2.4 - 16.1* 294^2

u sin x = 57.39 .. (ii)

dividing (ii) by (i)

tan x = 57.39/ 62.5

x = 42.56

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a)

putting in (i)

u = 84.85 ft/s

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b)

x = 42.56 degrees

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