Ch. 7 & 8 Quiz Started: Oct 30 at 9:27am Quiz Instructions This quiz is timed fo
ID: 1791409 • Letter: C
Question
Ch. 7 & 8 Quiz Started: Oct 30 at 9:27am Quiz Instructions This quiz is timed for 30 minutes, so make sure your connection is stable before starting. You are allowed two attempts, with the highest score counting to your grade. If your first attempt does not go well, it is strongly recommended that you pend more time working homework problems before making another attempt t is class policy that you should do this quiz on your own, without the help of classmates, tutors, relatives, or friends. You may use notes and your worked homework problems during the quiz. Question 5 4 pts A small ball with speed 24 m/s collides elastically with a larger ball that is initially at rest. The collision is head on and all motion occurs along a straight line. Take the mass of the larger ball to be twice that of the smaller. Find the velocity of the larger ball after the collision. Express your answer in m/s and round to the nearest m/s Next No new data to save. Last checked at 9:42am Submit Quiz PrtScn Home F3 FS F7 F8Explanation / Answer
for elastic collision, {samaller ball changes its direction with v then larger starts moving ahead with V}
velocity of separation = velcity of approach
24 = v + V .... (i)
Now applying momentum conservation,
(m x 24) + 0 = - m v + 2m V
- v + 2V = 24 .... (ii)
(i) +(ii) => V = (24 + 24)/3= 16 m/s ........Ans