Unity Unity Physics and Animation 3

Question 1

What is the role of Root Motion in Unity character animation?

Accepted Answer

It drives character movement from the animation clip's embedded motion data rather than script

Answer

Root Motion allows the movement encoded in the animation clip itself to drive the character's Transform, resulting in more natural motion.

Question 2

Which method is called in Unity when two non-trigger Colliders first make contact?

Accepted Answer

OnCollisionEnter()

Answer

OnCollisionEnter() is called on the first frame two non-trigger colliders make physical contact, providing a Collision object with contact details.

Question 3

What is Inverse Kinematics (IK) used for in Unity animation?

Accepted Answer

Procedurally adjusting limb positions to reach a target point rather than using pre-baked keyframes

Answer

IK computes joint rotations backwards from an end-effector target, enabling limbs to dynamically reach toward objects in the scene.

Question 4

In Unity, what does the 'Constraints' section in the Rigidbody component allow you to do?

Accepted Answer

Freeze specific axes of position or rotation to restrict physics movement

Answer

Rigidbody Constraints let you lock specific position or rotation axes so the physics engine won't move or rotate the object on those axes.

Question 5

What is a Ragdoll in Unity physics?

Accepted Answer

A hierarchy of Rigidbodies and Joints that simulate a physically-driven character body

Answer

A Ragdoll connects Rigidbodies at each major bone with Joints, allowing the character's body to react physically to forces when active.

Unity Practice Test