A 3.00 kg block slides from rest from the bottom of an inclined plane, tilted up

Question

A 3.00 kg block slides from rest from the bottom of an inclined plane, tilted up at 25 degrees. This
acceleration is due to a tied string that goes up over a pulley attached to a 2.00 kg mass that falls from rest
2.00 m to the floor. (a) How fast is the block traveling up the ramp when the falling block hits the floor if
friction on the ramp is negligible? (b) How fast is the block traveling up the ramp when the falling block
hits the floor if the coefficient of friction on the ramp is 0.20? Use conservation of energy techniques.
(Perhaps check your answer via Newton

Explanation / Answer

a)(20-30sin25)/5=a a=1.46 m/s^2 v^2=2aS=2*1.46*2 v=2.41 m/s b)(20-30sin25-30cos25*.2)/5=a v=1.22 m/s

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