5. 012 points I Previous Answers GiocP2 7.P027 My Notes Ask Your Teacher Two bil

Question

5. 012 points I Previous Answers GiocP2 7.P027 My Notes Ask Your Teacher Two billiard balls undergo an elastic collision as shown in the figure below. Ball 1 is initially traveling along x with a speed of 16 m/s, and ball 2 is at rest. After the collision ball 1 moves away with a speed of 8.0 m/s at an angle 60 For the following questions, assume the mass of ball 1 is equal to the mass of ball 2.) Ball Ball 1 Ball 2 (a) Find the speed of ball 2 after the collision. X m/s (b) What angle does the final velocity of ball 2 make with the x axis? counterclockwise from the +x axis Need Help? Read It L Talk to a Tutor

Explanation / Answer

conserving momentum in both directions(x and y)

initial momentum =final momentum

m(16)=m(8cos(60))+mvx

we got vx=12 m/s

in y direction

0=m8sin(60)+mvy

we got vy=-6.92 m/s

velocity of ball=12i+6.92 j

magnitude=13.9 m/s

angle=330 degree

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