Railroad car A rolls at a certain speed and collides inelastically with car B of the same mass. After the collision the cars stick together.

How does their speed after the collision vAB compare with the initial speed of car A vA0?
Express your answer using two significant figures.

vAB/vA0=

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

there are no components of a physical goal mentioned on the list of choices that you've provided.