Question

Two rams run toward each other. One ram has a mass of 49 kg and runs west

with a speed of 7 m/s, while the other has a mass of 52 kg and runs east with
a speed of 9 m/s. What will the momentum of the system made up of the two
rams be after they collide? Assume the total momentum of the system is
conserved.
A. 125 kg-m/s west
B. 125 kg-m/s east
C. 811 kg m/s west
D. 811 kg-m/s east

Answer 1

D. 125 kg-m/s east

Step-by-step explanation:

N

W E

S

momentum of box moving east: 52 * 9 = 468 kg-m/s east

momentum of box moving west: 49 * 7 = 343 kg-m/s west

so finally moving towards, 468 - 343 = 125 kg-m/s east