Pre-Lab 10: Conservation of Energy Name 1. A small mass of 150 grams is relcased

Question

Pre-Lab 10: Conservation of Energy Name 1. A small mass of 150 grams is relcased fom rest and alloved to fall from rest at an initial height of 1.50m to a final height of 1.00m. Determine the following Kup" Kbof" Eop You will allow a meter stick to rotate about an axis through one end of the stick. Raise the stick so that it is horizontal, and release the stick from this position. Now determine the speed of the far end of the stick as it rotates through the vertical position (the lowest point in its swing). 2. You will need to consider: How far the center of the stick falls (think about this) The moment of inertia of the stick about an end (look this up in the chapter on rotation) How do you write out rotational kinetic energy (I'll give you this one)

Explanation / Answer

Only One question can be posted as per chegg guidelines ,

1.

Since it starts from rest ,initial velocity is zero i.e Vtop=0

KEtop = (1/2)mVtop2 =0

Ug,top=mghtop=0.15*9.81*1.5=2.207 J

Etop=0+2.207 =2.207 J

At the bottom

Ug,bottom=0.15*9.81*1=1.472 J

Kg,bottom=2.207-1.472 =0.735 J

Ebotttom=2.207 J

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