Chapter 8 A skater of mass & skater approaches a child of mass 40 kg. whom he li
ID: 2032792 • Letter: C
Question
Chapter 8 A skater of mass & skater approaches a child of mass 40 kg. whom he lifts on his shoulders. Our goal will be to estimate the final velocity of the skater +child. Coordinate system: a is right. of masssow initially moves in a straight line at a speed of 5 ms. ?? 32. Initial velocity of the skater, v 37 Final velocity of the child, 3) 5 m/s 10 m's D) 2 m/s A) 10 m/s B) 0 C)5 m/s .33 m/s 33. Initial velocity of the child,t 38. If the skater child happens to slow down after the collision, what can we attributed this change to, other than A) 2 m/s B) 10 ms 5 m/s ymmetry 34. Relevant mass after the collision: Acceleration A) 80 kg 40 kg 120 kg 160 kg 39. What type of collision is this? A) Elastic 35. Final velocity of the skater and the child, V 40. Is linear momentum conserved in this 3.33 m/s collision? 5 m/'s C)0 D) 10 m/s A) Yes No 36. Final velocity of the skater, 41. Is kinetic energy conserved in th collision? A) 0 B) 10 m/s ) Yes 3.33 m's 5 m/s mov Othn AthvExplanation / Answer
32) B) 5 m/s
33) D) 0
34) C)120 kg
35) A) 3.33 m/s
(80 + 40)*v = 80*5
v = 80*5/120
= 3.33 m/s
36) C) 3.33 m/s
37) D) 3.33 m/s
38) C) Force
39) Inelastic
40) A) yes
41) B) No
because, final kinetic energy less than initial kinetic energy