# physics

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Posted by sandhu on Thursday, November 25, 2010 at 6:23am.

A block starts with a speed of 18.0 m/s and slides for a distance of 2.2 m down a 40° ramp (ìk = 0.43). What is its final speed? (m/s)

physics - drwls, Thursday, November 25, 2010 at 9:19am
Final KE = PE loss - (work done against friction)
(1/2)M V^2 = M g L sin40 - M g L cos40*0.43
L = 2.2 m. Cancel out the M's and solve for V^2.

physics - sandhu, Thursday, November 25, 2010 at 9:44am
What about the initial speed of 18.0 m/s when it starts?

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