Servo in starter kit

What is the torque of servo included in the starter kit? Do I need larger servo to use in physical things? I know a little mechanics, so feel free to use technical terms :wink:

There are different kits that will include different servos but here are links to technical details of a couple of servos

The servos that come in starter kits show the principles of operation and will work with small models.
If by "physical things" you mean "big things" you will need larger servos and more power.