Question
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?
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?
Answers
Damon
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
it is at ground level when d = 0 and when
2 - d/30 = 0
or when d = 60