Monday

December 22, 2014

December 22, 2014

Posted by **Megan** on Wednesday, October 17, 2012 at 11:03am.

- Physics URGENT!!! -
**Elena**, Wednesday, October 17, 2012 at 11:16amx: m•v1=(m1+m2) •v(x),

y: m•v2 =(m1+m2) •v(y),

v(x)= m•v1/(m1+m2),

v(y) =m•v2 /(m1+m2),

v=sqrt[v(x)²+v(y)²],

φ =arctan {v(y)/v(x)}.

∆K = Kf −Ki =

=(m1•v²/2 +m2•v²/2) - (m1 +m2) •v²/2.

mechanical energy -> thermal energy, sound, etc

- Physics URGENT!!! -
**Megan**, Wednesday, October 17, 2012 at 11:26amCan you give me the values so I can compare, I don't think I am getting the right values!

- Physics URGENT!!! -
**Elena**, Wednesday, October 17, 2012 at 11:36amx: m1•v1=(m1+m2) •v(x)

y: m2•v2 =(m1+m2) •v(y)

v(x)= m1•v1/(m1+m2) =75•6/(75+82)=2.87 m/s

v(y) =m2•v2 /(m1+m2)= 82•5/(75+82)=2.66 m/s

v=sqrt[v(x)²+v(y)²] =3.91 m/s

φ =arctan {v(y)/v(x)} =42.8⁰

∆K = Kf −Ki =(m1•v²/2 +m2•v²/2) - (m1 +m2) •v²/2 =

=(75•36/2 +82•25/2) –(75+82) •3.91²/2=

=1350 +1025 -1200 =1175 J

- Physics URGENT!!! -
**Megan**, Wednesday, October 17, 2012 at 11:41amThank you!

**Answer this Question**

**Related Questions**

Physics URGENT!!! - A 91.0 kg fullback running east with a speed of 6.00 m/s is ...

physics - A 89.0 kg fullback running east with a speed of 5.00 m/s is tackled by...

Physics - A 79.0-kg fullback running east with a speed of 4.00 m/s is tackled by...

physics - An 87.0 kg fullback moving east with a speed of 5.0 m/s is tackled by ...

PHYSICS HELP! - An 88.5 kg fullback moving east with a speed of 5.5 m/s is ...

physics - 001 (part 1 of 2) 10.0 points An 86 kg fullback moving east with a ...

physics - A 95 kg fullback is running at 7.5 m/s to the east and is stopped by a...

Physics - A 90 kg halfback runs north and is tackled by a 120 kg opponent ...

physics 111 - A runner times his speed around a circular track with a ...

Physics - A 125 kg fullback is running at 5.0 m/s to the east and is stopped in ...