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### quest_11

Course: PHYS 2101, Fall 2007
School: LSU
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Word Count: 479

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11 Chapter Questions 1. A cannonball rolls down an incline without sliding. If the roll is now repeated with an incline that is less steep but of the same height as the rst incline, are (a) the balls time to reach the bottom and (b) its translational kinetic energy at the bottom greater than, less than, or the same as previously? lp p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p l ppp p...

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11 Chapter Questions 1. A cannonball rolls down an incline without sliding. If the roll is now repeated with an incline that is less steep but of the same height as the rst incline, are (a) the balls time to reach the bottom and (b) its translational kinetic energy at the bottom greater than, less than, or the same as previously? lp p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p l ppp p 1 > 2 6 A A h B B p pppppppp 1 p p p p p p p p p?p p p p p p p p p p p p p p p p p p p p p p 2 p p p 2. Figure 11-24 shows two particles A and B at xyz coordinates (1 m, 1 m, 0) and (1 m, 0, 1 m). Acting on each particle are three numbered forces, all of the same magnitude and each directed parallel to an axis. (a) Which of the forces produce a torque about the origin that is directed parallel to y? (b) Rank the forces according to the magnitudes of the torques they produce on the particles about the origin, greatest rst. y ppppppppppppr p &pp & pp a 1& pp pp 2 c T pp p 4 pp pp pp b &5 pp p& p& E pp p p p p p p p p p r p p A E 3 x Figure z B 6 3. 11-29 shows an overhead view of a rectangular slab that can spin like a merry-go-round about its center at O. Also shown are seven paths along which wads of bubble gum can be thrown (all with the same speed and mass) to stick onto the stationary slab. (a) Rank the paths according to the angular speed that the slab (and gum) will have after the gum sticks, greatest rst. (b) For which paths will the angular will the angular momentum of the slab (and gum) about O be negative from the view of Fig. 11-29? 2a E Ep p p p p p p p p p p p pp r O p p pp 2 ppp pp ppp p pp ppp B p 3e T u e 4e 5 e 1 a '7 T 6 4. What happens to ...

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