Summary - Physics

Reinforce physics concepts with a summary task.

Summary: Physics System

In this module, you learned the core pillars of Unity's physics simulation. Rigidbody grants gravity, mass, and accelerated forces, while Collider types outline contact boundaries.

// Physics system summary:
// Rigidbody -> Mass, gravity, and AddForce
// Solid contact -> OnCollisionEnter
// Pass-through zone -> Is Trigger and OnTriggerEnter

Solid interactions are governed via the OnCollision cycle, while detection zones are managed using Is Trigger and OnTrigger callbacks.

Exercise Print complete physics profile

To summarize an object's physics profile, define body ("Rigidbody"), shape ("BoxCollider"), and state ("Solid"). Print Physics: Rigidbody | Shape: BoxCollider | Mode: Solid to the console.

Show example solution

using System;

class Program
{
    static void Main()
    {
        string body = "Rigidbody";
        string shape = "BoxCollider";
        string state = "Solid";
        Console.WriteLine("Physics: " + body + " | Shape: " + shape + " | Mode: " + state);
    }
}

Test yourself

Under which circumstance is OnTriggerEnter triggered instead of OnCollisionEnter?
- When an upward force is applied to the object using AddForce
- When the object's name is modified in the Hierarchy panel
- When the Is Trigger checkbox is enabled on the Collider component
- When the GameObject is completely destroyed and removed from scene
Show answer

When the Is Trigger checkbox is enabled on the Collider component — When Is Trigger is enabled, the object stops solid collision and fires OnTrigger events instead of OnCollision.

Complete trigger enter method

void ____(Collider other)

Show answer

void OnTriggerEnter(Collider other)

Physics concepts summary

Rigidbody

Simulates mass & gravity — component
BoxCollider

Defines cubic collision bounds
AddForce

Gives object accelerated motion
Is Trigger

Disables collision, enables zone detect

Next lesson: What is a Sprite?

We Are Enhancing Your Experience

Cookie Preferences

Strictly Necessary Cookies

Analytical Cookies