Freya has a mass of 14kg she is running at 1.1m/s to the left when she runs into eric, who is standing still. eric has a mass of 18kg. after the collision, they continue moving together. what is their velocity after the collision. a. 0.48 m/s to the leftb. 2.5 m/s to the leftc. 0.86 m/s to the leftd. 1.4 m/s to the left

Their final velocity  is 0.48 m/s.

We can use conservation of momentum to calculate the magnitude of the final velocity.

Momentum before collision is equal to the momentum after collision

m1v1+m2v2=(m1+m2)v

here, v is final velocity , assuming right side velocity as positive, and left side velocity as negative.

14*(-1.1)+18*(0)=(14+18)v

v=-0.48 m/s

Here, negative sign indicates that they both  will move in left direction.

they should be similar or the same

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.