a 10.0 kg cart and a 15 kg cart are locked together with a compressed spring between them. they are then released so that the spring pushes the two carts apart. the 15 kg cart is moving at 3.0 m/s afterward. how fast is the 10.0 kg cart moving?

a) 3.0 m/s

b) 4.5 m/s

c) 5.0 m/s

4.5 m/s

Explanation:

Initial momentum = final momentum

0 kg m/s = (15 kg) (3.0 m/s) + (10.0 kg) v

v = -4.5 m/s

The negative sign means it's moving in the opposite direction.

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.