physics
posted by collisions .
Two masses are involved in an elastic collision. The first has a mass of 0.150 kg and an initial velocity of 0.900 m/s directed at an angle of 50 degrees with the positive yaxis as shown below. The second mass, of 0.260 kg moves along the xaxis with an initial velocity of 0.540 m/s. After the collision, the first mass has a velocity of 0.640 m/s at an angle of θ=11 degrees above the positive xaxis. The second mass has an angle φ, directed below the positive xaxis. Find the magnitude and direction of the second mass's final velocity. (answers given: φ = 35.09 degrees, and V2f= 0.703 m/s).

Not having your diagram, I do not know if the first mass is at 50 degrees from the y axis in quadrant 1 or quadrant 2
Therefore I can only tell you what to do
X momentum before = .15 * .9 cos40 (or cos 40) + .26 *.540
=
X momentum after = .15*.64 cos 11 +or .26*V2 cos phi
Y momentum before = .15*.9 cos 50 + 0
=
Y momentum after = .15*.9 sin 11  .26*V2 sin phi
and
(1/2).15 (.9)^2 + (1/2).26(.54)^2
=
(1/2).15(.64)^2 + (1/2).26(V2)^2 
its in quadrant 2, going in negative y direction. i already solved the answer though thanks!
Respond to this Question
Similar Questions

Physics 2D Collisions
nitially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is … 
Physics
Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is … 
Physics
Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is … 
physics
1) Mass m1 = 0.7 kg moves with constant velocity v1i = 2.0 m/s along the xaxis and collides with mass m2 = 1.8 kg, which moves with velocity v2i = 3.4 m/s, as sketched below. After the collision, m1 and m2 stick together. Find the … 
physics
1) Mass m1 = 0.7 kg moves with constant velocity v1i = 2.0 m/s along the xaxis and collides with mass m2 = 1.8 kg, which moves with velocity v2i = 3.4 m/s, as sketched below. After the collision, m1 and m2 stick together. Find the … 
physics
Two Bals. of masses mA = 45 grams and mB = 65 grams are suspended as shown. The lighter ball is pulled away to a 66 degree angle with the vertical and released:  /   /รจ   /    30 cm /    mA … 
Grade 12 Physics
Two hockey pucks of equal mass approach each other. puck 1 has an initial velocity of 20.0 m/s (S 45 E), and puck 2 has an initial velocity of 15 m/s (S 45 W). after the collision, the first puck is moving with a velocity of 10.0 (S … 
Physics
Mass m1 = 0.5 kg moves with constant velocity v1i = 2.5 m/s along the xaxis and collides with mass m2 = 2.6 kg, which moves with velocity v2i = 3.1 m/s, as sketched below(completely vertical). After the collision, m1 and m2 stick … 
Physics
Two hockey pucks of equal mass are involved in a perfectly elastic, glancing collision, as shown in the figure below. The orange puck is initially moving to the right at voi = 3.95 m/s, when it strikes the initially stationary blue … 
Physics
The drawing shows a collision between two pucks on an airhockey table. Puck A has a mass of 1.5 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 3.2 kg and is initially …