Broward County Public Schools
Force and Motion
Get the ball rolling with this upper-elementary science unit on forces and motion. Offering over three weeks of physical science lessons, this resource is a great way to engage the class in learning about simple machines, friction,...
Texas Education Agency
Texas Gateway: 4.2 Newton's First Law of Motion: Inertia
By the end of this section, you will be able to define mass and inertia and to understand Newton's First Law of Motion: There exists an inertial frame of reference such that a body at rest remains at rest, or, if in motion, remains in...