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November 28, 2014

November 28, 2014

Posted by **Em** on Sunday, February 27, 2011 at 7:56pm.

I found the velocity of the third piece to be 48.738 m/s

but i need help finding:

What is the direction of the third piece?

- Physics - Please Help -
**Anonymous**, Sunday, April 3, 2011 at 6:33pmhow did u find

- Physics - Please Help -
**Rohon Ray**, Saturday, September 13, 2014 at 7:02pmFrom conservation of momentum:

initial momentum of ball= (total momentum of the three balls)+(impulse of the wall)

First, lets find the momentum of the entire system in the x-axis.

(6.80)(22.0)cos(0)= 2670*(0.11)cos(0)+((2.80)(10.1)cos(32))+(1.80)(8.30)cos(-28)+(6.80-2.80-1.80)(v)cos(theta)

v*cos(theta)=-82.397289634823

Now lets take the total momentum in the system in the y-axis

(6.80)(22.0)sin(0)= (2670)(0.110)sin(0)+(2.80)(10.1)sin(32)+(1.80)(8.30)sin(-28)+(6.8-2.80-1.80)v*sin(theta)

v*sin(theta)=3.623732565679

v*cos(theta)=-82.397289634823

tan(theta)= (3.6237325665679/-82.397289634823)

theta= -2.5181760257216 degrees

In other words the third ball will go at the direction 2.5181760257216 degrees below the horizontal.

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