Investigating Forces

When several forces are acting on an object that is at rest, and the object does not move, the forces are ______.

• unbalanced

• balanced

• poles

• predict

Objects that are changing position are said to be in _______

• pattern

• motion

• lubricant

• attract

Friction makes movement _____

• easier

• harder

Friction occurs when objects are _______

• in contact with one another

• not touching each other

Friction causes motion to ______

• speed up

• slow down

Is the following harmful or helpful friction: Starting a campfire by rubbing two sticks together.

• harmful

• helpful

Is the following harmful or helpful friction: Parts wearing down on an engine.

• harmful

• helpful

If you know the pattern of an object, you can _____ how it will move.

• paint

• predict

• train

Tags

NGSS.MS-PS3-1

If something falls from a table, what TWO forces were acting on it the entire time?

• gravity

• push forces

• ground forces

• magnetism

Tags

NGSS.MS-PS2-4

North and south poles ______

• repel

• attract

Tags

NGSS.MS-PS2-3