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March 26, 2017

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This question is about equations reducible to quadratics:

Gerald hits his golf ball down the fairway. The path the ball followed was parabolic in shape with the relationship:

h=2d-1/30d^2

where h is the height above the ground of the golf ball when it is a horizontal distance d from him. Both h and d are in metres. How far from Gerald did the golf ball land?

  • Math - ,

    0 = 2d -(1/30) d^2 = d [2 - (1/30)d ]
    it is at ground level when d = 0 and when
    2 - d/30 = 0
    or when d = 60

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