# Science Chapter 2 - IPCH

Forces change an object's motion by changing its...

speed/ direction/ both

Only unbalanced forces change an object's...

velocity

Unbalanced forces affect an object at...

rest

If the direction of the net force on an object is opposite to the direction the object is moving, the object will...

slow down

Circular motion

any motion in which an object is moving along a curved path

centripetal force

a force that acts perpendicular to the direction of motion toward the center of a curve

Satellites and the moon experience...

centripetal force

momentum

mass x velocity

An object's momentum is the...

same direction as its velocity

An object with more mass has...

more momentum

The force on an object equals its change in...

momentum

In any collision, momentum transfers from...

one object to another (train example in challenge)

When colliding objects bounce off each other, an _____ collision occurs

elastic

If objects collide and stick together, such as when one football player tackles another, the collision is...

inelastic

No matter the type of collision, the total momentum will be...

the same before and after the collision.