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Homework Statement
A(n) 2300 g block is pushed by an external
force against a spring (with a 14 N/cm spring
constant) until the spring is compressed by
19 cm from its uncompressed length. The
compressed spring and block rests at the bot-
tom of an incline of 33◦ .
The acceleration of gravity is 9.8 m/s2 .
Note: The spring lies along the surface of
the ramp (see figure).
Assume: The ramp is frictionless.
Now, the external force is rapidly removed
so that the compressed spring can push up
the mass.
[PLAIN]http://img64.imageshack.us/img64/5812/problem6l.jpg
(a)How far up the ramp (i.e., ℓ the length
along the ramp) will the block move (measured
from the end of the spring when the
spring is uncompressed) before reversing di-
rection and sliding back?
Remember, the block is not attached to the
spring.
Answer in units of cm.
(b)Repeat the first part of this question, but
now assume that the ramp has a coefficient of
friction of μ = 0.308 .
Keep all other assumptions the same.
Answer in units of cm.
Homework Equations
[tex]\Delta[/tex]K= Kf-Ki=1/2mvf2-1/2mvi2
Etotal=1/2mk2+1/2mv2
The Attempt at a Solution
I don't know where the angle comes in...
I know that N=mgcos[tex]\theta[/tex]
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