Thursday

September 18, 2014

September 18, 2014

Posted by **Alexis** on Friday, February 28, 2014 at 8:47pm.

a) Write parametric equations to model the situation.

b) How far will the ball travel( if it hits the ground)show work

- Pre-Calculus -
**Henry**, Tuesday, March 4, 2014 at 8:39pmVo = 32Ft/s[35o]

Xo = 32*cos35 = 26.21 Ft/s.

Yo = 32*sin35 = 18.35 Ft/s.

a. Y = Yo + g*Tr = 0 @ max. ht.

Tr=(Y-Yo)/g = (o-18.35)/-32.4=0.566 s

= Rise time or time to reach max. ht.

hmax = ho + Yo*t + 0.5g*Tr^2

hmax = 4.5 + 18.35*0.566 - 16.2*0.566^2 = 9.70 Ft above gnd.

b. hmax = 0.5g*t^2 = 9.70 Ft.

16.2*t^2 = 9.70

t^2 = 0.599

Tf = 0.7740 s. = Fall time or time to

fall to gnd.

Range = Xo * (Tr+Tf)

Range = 26.21 * (0.566+0.774) = 35.12 Ft

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