difference between free movement of goods and free mobility of capital?

Goods require transport: ships, railroads, trucks, etc.

Capital was just paper and has become just electrons.

In both cases, governments often try to regulate the movement. For goods there are embargoes, tariffs, quotas, etc. For capital there are capital controls:
http://en.wikipedia.org/wiki/Capital_control

Goods are end products - things one can purchase. Capital is the stuff that allows those goods to be manufactured: machinery, factory buildings, cash investments, raw materials, etc.