- #1

pooface

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**TEST question!**

## Homework Statement

Golf ball is struck at 12 m above the plain of a tee giving it a velocity of 40m/s at an angle of 30degrees.

a) find the time of flight

b) find max height above plane

c) horizontal distance to point of landing.

d) final velocity and angle.

## Homework Equations

## The Attempt at a Solution

Vox = 40cos30

Voy = 40sin30

a) -12 = 40sin30t + 0.5(-g)t^2

t=4.6084 seconds

b) disregarding the 12m elevation (which i will add later on).

0=40sin30t + 0.5(-g)t^2

t=4.0775s

t/2 = time at peak

y= - 0.5(-g)t^2 +12

= 32.387m

c)x =voxt

= 34.34(4.6084)

=158.25m

d)

-12= Vfy(4.6084) -0.5(-g)(4.6084)^2

Vfy = 25.21m/s

angle = arctan(vfy/vox) = -36.28deg

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