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## Homework Statement

A golf ball is hit with a velocity of 22.8m/s at an angle of 40.0° with respect to the horizontal.

a) Find the range of the golf ball.

b) Find the maximum height reached by the golf ball.

## Homework Equations

d

_{v}=1/2*at

^{2}

d

_{h}=V

_{h}*Δt

Kinetic equation d=V

_{i}*t+ 1/2*at

^{2}

d

_{h}=-V

^{2}*sin2θ /g

sinθ=opp/hyp

cosθ=adj/hyp

Δt=-2Vsinθ / g

## The Attempt at a Solution

a) d

_{h}=-V

^{2}*sin2θ /g= 52.24m

b)d

_{v}=sin(40)*22.8=14.7m

I am unsure of which equations to use in this problem but I've attempted something that I think may be right but would greatly appreciated if someone could just check my answers and correct me if necessary and explain which equations you use if applicable. Also if you could let me know if all my significant figures are being respected, I still have a hard time remembering the rules... if anyone had a trick for remembering the sig fig rules and would like to share that would be awesome! Thanks so much in advance!