Two bodies of equal mass m collide and stick together. The quantities that always have equal magnitude for both masses during the collision are

The quantities that always have equal magnitude for both masses during the collision are change in momentum of the colliding bodies and force exerted by each body

Explanation:

During collision of two bodies, the following quantities are affected;

Kinetic energy of the colliding bodies

change in momentum of the colliding bodies

Force exerted by each body

Two bodies that stick together after collision is inelastic collision.

For inelastic collision, the kinetic energy before collision is greater than kinetic energy after collision.

Change in momentum is zero, that is, momentum before collision is equal to momentum after collision.

According Newton's third law of motion, the force exerted by each body is equal but acts in opposite direction.

Therefore, the quantities that always have equal magnitude for both masses during the collision are change in momentum of the colliding bodies and force exerted by each body

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

small = small current large mag large current