A2 kg ball of putty moving to the right at 3 m/s has a perfectly inelastic, head-on collision with a 1 kg ball of putty moving at 2 m/s. what is the final magnitude and direction (left or right) of the velocity of the balls after the collision?

  to the right

Explanation:

The balls collide in a completely inelastic collision, in other words they have the same velocity after the collision, this velocity has a magnitude V.

We need to use the conservation of momentum Law, the total momentum is the same before and after the collision.

In the axis X:

    (1)

iron would move it is magnetic there is a mag field around the current in the wire

the bal will not change its velocity.