Contact Forces Test Practice

During a collision:

• At least one object gets damaged.

• Both items get damaged.

• Neither item is ever damaged.

• Sometimes objects get damaged, other times objects are not damaged.

All objects have an elastic limit.

• True

• False

If an object goes past its elastic limit,

• It will reach its breaking point.

• It will rebound in the opposite direction.

• It will bend and retract.

• It will stretch and retract.

What can make objects change shape?

• Potential energy.

• Contact forces.

• Objects never change shape.

• Color of objects.

Energy is transferred in a collision.

• True

• False

When any amount of contact force is applied to them, all solid objects:

• Bend

• Change shape

• Break

• Change color

The amount an object deforms depends on

• The type of material it is made of.

• How thick it is.

• Its shape.

• The temperature outside.

The amount of contact forces:

• Is not equal on the objects colliding.

• Is equal on the objects colliding, in the same direction.

• Is stronger on the item that is moving.

• Is equal on the objects that are colliding, but in opposite directions.

If peak forces are less than the elastic limit, the object will reach its breaking point.

• True

• False

What increases the size of peak forces between objects in a collision?

• Increase in kinetic energy.

• Increase in speed.

• Increase in mass.

• Decrease in mass.