In the accompanying photo, a penguin is ejected at point A with a speed of 7.40

Question

In the accompanying photo, a penguin is ejected at point A with a speed of 7.40 m/s.  Every part of the track except part L is frictionless and the lenght of section L is 14.0m and has a cofficient of kinetic friction of Uk = 0.70.  Heights H1 = 6.00m and H2 = 2.00m.

(A) what is the speed of the penguin at point B?

(B) what is the speed of the penguin atpoint C?

(C) does the penguin make it to point D?  If so, how fast is it going there?  If not, what is its distance traveled through region L?

....Please show work for each section, Thanks

Small pangolin (for fun: google image search this animal) is ejected at . Every part of the track except that marked L is frictionless and the of kinetic friction of mu k = 0.70. Heights h1 = 6.00m and h2 = 2.00. at point C?

Explanation / Answer

a) Ei = Ef
1/2 mv^2 + m gh = 1/2 mv^2

0.5*7.4^2 + 9.81*6 = 0.5*v^2
v=13.13 m/s

b) Ei = Ef

1/2 mv^2 + m gh = 1/2 mv^2+mgh

0.5*7.4^2 + 9.81*6 = 0.5*v^2+9.81*2

v=11.54 m/s

c)
Ei = 0.5*7.4^2 + 9.81*6

0.5*7.4^2 + 9.81*6 = 0.7*9.81*d+9.81*2


d=9.701 m
doesn't make it all the way

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