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An apple falls straight down from an apple tree growing on a 20 degree slope. The apple falls a distance of 2.5m before hitting the ground. (A) What is the apples speed as it hits the ground? (B) What are the components parallel and perpendicular to the ground of the velocity?

2007-09-18 12:10:11 · 2 answers · asked by Anonymous in Science & Mathematics Physics

2 answers

for A: suvat eqn

x=2.5
u=0
v=?
a=9.81
t=?

v^2=u^2+2as

plug in values

v=7ms^-1

dunno about b

2007-09-18 12:34:05 · answer #1 · answered by , 2 · 0 0

(A) v = - gt = -sqrt(g^2t^2)
= - sqrt(2gs) = -sqrt(2*9.8*2.5)
= -7(m/s)
(B) parallel: -7*sin(20 degree) = -2.4(m/s)
perpendicular: -7*cos(20 degree) = -6.6(m/s)

2007-09-20 22:39:13 · answer #2 · answered by Hahaha 7 · 0 0

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