Physics materials (friction, bounce) in Unity - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new Physics Material with a bounce of 0.5.

Unity

PhysicsMaterial2D material = new PhysicsMaterial2D();
material.bounciness = [1];

Drag options to blanks, or click blank then click option'

A0.5

B0

C1.0

D-0.5

Attempts:

3 left

💡 Hint

Common Mistakes

Using a negative value for bounciness causes no effect.

Setting bounciness to 1 makes the object bounce fully, not halfway.

The bounciness property sets how much the material bounces. A value of 0.5 means it bounces back halfway.

2fill in blank

medium

Complete the code to assign a Physics Material with friction 0.3 to a Collider2D component.

Unity

PhysicsMaterial2D mat = new PhysicsMaterial2D();
mat.friction = [1];
Collider2D col = gameObject.GetComponent<Collider2D>();
col.sharedMaterial = mat;

Drag options to blanks, or click blank then click option'

A0

B1.0

C0.3

D-0.3

Attempts:

3 left

💡 Hint

Common Mistakes

Using negative friction values is invalid.

Setting friction to 0 means no resistance to sliding.

The friction property controls how much the surface resists sliding. 0.3 is a moderate friction value.

3fill in blank

hard

Fix the error in the code to correctly set the bounce combine mode to 'Multiply'.

Unity

PhysicsMaterial2D mat = new PhysicsMaterial2D();
mat.bounceCombine = [1];

Drag options to blanks, or click blank then click option'

APhysicsMaterialCombine.Multiply

BPhysicsMaterialCombine.Minimum

CPhysicsMaterialCombine.Maximum

DPhysicsMaterialCombine.Average

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Average' instead of 'Multiply' changes bounce behavior.

Assigning string values instead of enum causes errors.

The bounceCombine property defines how bounce values combine. 'Multiply' multiplies the bounciness of colliding materials.

4fill in blank

hard

Fill both blanks to create a Physics Material with friction 0.6 and friction combine mode set to 'Minimum'.

Unity

PhysicsMaterial2D mat = new PhysicsMaterial2D();
mat.friction = [1];
mat.frictionCombine = [2];

Drag options to blanks, or click blank then click option'

A0.6

BPhysicsMaterialCombine.Average

CPhysicsMaterialCombine.Minimum

D1.0

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up combine modes changes physics behavior.

Using friction values outside 0-1 range causes unexpected results.

Set friction to 0.6 for moderate friction and frictionCombine to 'Minimum' to use the smallest friction value when colliding.

5fill in blank

hard

Fill all three blanks to create a Physics Material with bounce 0.8, bounce combine mode 'Maximum', and friction 0.4.

Unity

PhysicsMaterial2D mat = new PhysicsMaterial2D();
mat.bounciness = [1];
mat.bounceCombine = [2];
mat.friction = [3];

Drag options to blanks, or click blank then click option'

APhysicsMaterialCombine.Minimum

BPhysicsMaterialCombine.Maximum

C0.4

D0.8

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing bounce and friction values.

Using wrong combine mode changes physics behavior.

Set bounciness to 0.8 for high bounce, bounceCombine to 'Maximum' to use the highest bounce on collision, and friction to 0.4 for moderate friction.