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4.
A 2.0 kg mass shown is placed against a spring compressed by 10.0 cm from its
natural state. The mass is released and slides along a rough platform that has a
coefficient of friction of 0.44. The mass slides 20.0 cm after being released
from the spring. The height of the platform is 24 m. The spring constant k is 1.60
kN/m.
How fast is the mass moving at the moment it hits the ground?
10cm
wwwww.
-20cm-
m=2.0 kg

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