Tutorial 8

# Tutorial 8 - Phys 1L03 Tutorial session Eight series...

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Phys 1L03 Tutorial session Set 8 Eight series: Questions on Center of mass, Torque and equilibrium Concept: 1. Three masses, 2.0 kg, 3.0 kg, and 6.0 kg, are located at points (3.0, 0), (6.0, 0), and (-4.0, 0), respectively, in meters from the origin. Where is the center of mass of this system? 2. A dumbbell, Figure below, has a connecting bar of negligible mass. Find the location of the center of mass a. if m 1 and m 2 are each 5.0 kg and b. if m 1 is 5.0 kg and m 2 is 10.0 kg.

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3. A water molecule consists of an oxygen atom and two hydrogen atoms. Oxygen has a mass of 16 atomic units (u) and each hydrogen has a mass of 1 u. The hydrogen atoms are each at an average distance of 96 pm ( 96 x 10 -12 m) from the oxygen atom, and are separated from one another by an angle of 104.5 o . Find the center of mass of a water molecule. 4. Two children are balanced on a see-saw of negligible mass. (This assumption is made to keep the example simple.) The first child, sitting on left side of the pivot, has a mass of 26.0 kg and sits 1.60 m from the pivot. The second child, sitting on right side of pivot, has a mass of 32.0 kg and 1.3 m from the pivot. Calculate the position of center of mass of the two children:
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Tutorial 8 - Phys 1L03 Tutorial session Eight series...

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