6 0000 AT&T; LTE 10:34 PM 100% Figure 9-28 shows four groups of three or four id

Question

6 0000 AT&T; LTE 10:34 PM 100% Figure 9-28 shows four groups of three or four identical particles directions of the foroes en two of the particles are indicated. What are the magnitude and direction of the fonce acting on the thied particle if the cen- SN that move parallel to cither the x asis or the y asis at identical speeds Rank the groups acconding to center-ol-mass speed. greatest first ter of mass of the three-particle sys Fore 923 Question 1 tcm is (a) stationary, (b) moving at a constant velocity rightward, and (c)aocelerating rightwand? 2 Figure 9-24 shows an over- head view of four particles o equal mass sliding over a frie tioeless surface at comtant velocity. The directioas of the velocities are indicatedt their magnitudes are equal Consider2 (m pairing the particles Which pairs form a system with a cen cr of mass that (a) in stationary (b) ib stationary and at the on Figure 9-24 Question 2 gin and (c) passes through the origin? 3 Comider a bos that explodes into two picces while moving with a constant positive velocity along an x axis If one pioce, with mass A, ends up with positive velocity then the second piece, with mass mscould end up with (a) a positive velocity (Fig.9-25).(b) a negative veloaty (Fig. 9-2SS), or (c) tero velocity (Fig. 92S). Rank those three possihle results for the second piece according to the corresponding magnitude of vi.greatest first 40 Figure 9-28 Question 7 A block slides along a frictioness floor and into a stationary sec graph of the kinetic energies K of the Nocks (a) Determise which represents (6) an clastic collision and (c) an inclastic collision? block wih nd block with the same mass Figure29 shows four coices for rEpresent physically impossible situatioes Of the others, whish best Figare 9-25 Question 3 Figune 9-26 shows graphs of force magnitude versus time for body involved in a collision. Rank the graphs according to the magnitude of the impulse on the body.greatest first 5 The free-body diagrams in Fig.9-27 give, from overhead views the horinontal forces acting on three boues of chocolates as the Fipure 9.30 shows a saagshot of Hlock 1 as it slides along an x asis on a frictionless floor, before it us Question hlock 2.The figure also shows three ponsible positions of the center o mass (com) of the two-block syntem at the time of the snapshot. (Point 8 is halfway between the centers of the two blocks) Is block 1 station ary moving forward or moving backward after the collision if the com is locatied in the snapshot at (a) 4.(b) B and (c)C

Explanation / Answer

#7
(a)
Kinetic Energy can be never Neagative.
As Graph goes Negative, in the Option (c) so this situation is impossible.

Correct option -(c)

(b)
In Elastic Collision, K.E is Conserved
The Graph which best describes This Conservation is (a).

So, correct option - (a)

(c)
In Elastic Collision, Kinetic Energy will not be conserved,

The graph which best describes this situation is option(b).
As in the graph we can clearly see, Final K.E < Initial K.E

Correct option - (b)

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