- #1
mandy9008
- 127
- 1
Homework Statement
A 28.0 g object moving to the right at 19.0 cm/s overtakes and collides elastically with a 5.0 g object moving in the same direction at 15.0 cm/s. Find the velocity of each object after the collision.
Homework Equations
mv + mv = mv + mv
The Attempt at a Solution
(28.0 g)(19.0 cm/s) + (5.0 g)(15.0 cm/s) = (28.0 g)v1f + (5.0 g)v2f
607 g cm/s = 28 g v1f + 5 g v2f
607 cm/s = 28 v1f + 5 v2f
(574 cm/s = v1f + v2f )-5
607 cm/s = 28 v1f + 5 v2f
-2870 cm/s = 5 v1f - 5 v2f
-2263 cm/s = 23 v1f
v1f = -98.4 cm/s
v2f = -5.83 cm/s
I know that both velocities have to be positive, so I know these values cannot be right.