A ball of mass 6.00 kg moving with a velocity of 10.0 ms-1 collides with a 2.0 kg
ball moving in the opposite direction with a
velocity of 5.0 ms-1. After the collision the
two balls coalesce and move in the same
direction. Calculate the velocity of the
composite body.​

v=8,7m/s

Explanation:

Quando dois corpos andam aglutinados, significam que têm a mesma velocidade, e a quantidade de movimento antes de uma colisão, é igual á quantidade de tempo depois dessa colisão

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.