Posted by **Sherrie** on Monday, October 4, 2010 at 2:43pm.

A golf club contacts a golf ball for 0.15s at an angle to the horizontal and the ball strikes the ground a distance away. Initial speed is 25 m/s

Angle of projection is 15 degrees

Calculate time between ball leaving club and when it touches ground

The range of the ball down fairway and average force exerted by club on ball.

Can you direct me -I'm not great at deciphering the info I need to put into formulas- that's the part that confuses me

Thanks

- Physics -
**bobpursley**, Monday, October 4, 2010 at 5:30pm
That is the part that is physics: analyzing and modeling problems.

Break the initial velocity into vertical and horizontal components.

vertical: 25sin15

horizontal: 25cos15

the time in air depends on the vertical.

hf=hi+Vivertical*time-4.9t^2

hf=hi=0

solve for time t.

then, horizontal distance=t*horizontalvelocity

finally: average force on ball

force*timeimpact=changemomentum

force*.15s=massball*25

I don't see massof the ball mentioned.

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