Motion and Forces Vocabulary

a place or object used for comparison to determine if an object is in motion

• reference point

• magnitude

• inertia

a force that opposes motion between two surfaces that are in contact

• gravity

• friction

• mass

When two or more equal forces act upon an object, resulting in no motion.

• friction

• balanced force

• unbalanced force

• inertia

When two or more unequal forces act upon an object, resulting in a change or in motion or direction.

• balanced force

• unbalanced force

• inertia

• friction

Tags

NGSS.MS-PS2-2

motion

• a force that pulls an object towards Earth

• using a force to move an object a distance

• the change in an object's position over time

• an outside force that occurs when two objects rub together

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

An object is in motion if it changes position relative to a _______________________.

• net force

• reference point

• relative point

___________ between your feet and a sidewalk prevent you from slipping as you walk.

• gravity

• weight

• friction

• inertia

What type of force causes a reaction or a change in motion?

• balanced force

• unbalanced force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the difference in position between the starting position and the final position of an object that has moved? (Hint: This distance is the "straight line" distance between the starting position and the final position of an object.)

• displacement

• position

• net force

• speed

equal forces acting on an object in opposite directions

• unbalanced forces

• balanced forces

• motion