physical
what is the size and direction of the final velocity of the two cars when a 0.4 kg toy train car moving forward at 3 m/s collides with and sticks to a 0.8 kg toy car that is traveling the opposite direction of 2 m/s
asked by
crystal

original momentum in x direction
= .4*3  .8*2
= 1.2 1.6
= 0.4 kg m/s
so moves to left if first car was moving right
final momentum in x direction = (1.2)v
final momentum = original momentum (first law)
1.2 v = 0.4
v =  1/3 meter/secondposted by Damon
Respond to this Question
Similar Questions

science
a 600 kg toy car moving at 3 m/s collides and hooks up with a 900 kg toy car at restand they move off together. What is their final velocity? 
physics
4. A train car with mass m1 = 684 kg is moving to the right with a speed of v1 = 7.2 m/s and collides with a second train car. The two cars latch together during the collision and then move off to the right at vf = 4.4 m/s. b) Now 
Physics
A 20.0 g toy car moving to the right at 21.0 cm/s has a headon collision with a 34.0 g toy car moving in the opposite direction at 47.0 cm/s. If they begin 396.0 cm apart, how long does it take the cars to collide? 
physics
A 13 g toy car moving to the right at 22 cm/s has a headon nearly elastic collision with a 22 g toy car moving in the opposite direction at 30 cm/s. After colliding, the 13 g car moves with a velocity of 43 cm/s to the left. Find 
Math
The supply and demand for a business manufacturing toy cars are given by these two equations, where y is the price in dollars per item and x is the number of toy cars sold in thousands. Supply: y = x^2 − x + 0.5 Demand: y = 
physics
A 3 kg toy car with a speed of 10 m/s collides headon with a 2 kg car traveling in the opposite direction with a speed of 3 m/s. If the cars are locked together after the collision with a speed of 4.80 m/s, how much kinetic 
physics
A 3 kg toy car with a speed of 10 m/s collides headon with a 2 kg car traveling in the opposite direction with a speed of 2 m/s. If the cars are locked together after the collision with a speed of 5.20 m/s, how much kinetic 
physics
A 3 kg toy car with a speed of 10 m/s collides headon with a 2 kg car traveling in the opposite direction with a speed of 2 m/s. If the cars are locked together after the collision with a speed of 5.20 m/s, how much kinetic 
physics
A 3 kg toy car with a speed of 10 m/s collides headon with a 2 kg car traveling in the opposite direction with a speed of 2 m/s. If the cars are locked together after the collision with a speed of 5.20 m/s, how much kinetic 
physics
A 1.30 × 10 4 kg railroad car moving at 6.70 m/s to the north collides with and sticks to another railroad car of the same mass that is moving in the same direction at 1.83 m/s. What is the velocity of the joined cars after the