New Hampshire Standards
NH.PS3. Physical Science: The motion of an object is affected by force.
S:PS3:8:1.2. Forces: Students will recognize the general concepts related to gravitational force.
S:PS3:8:1.3. Forces: Students will use data to determine or predict the overall (net) effect of multiple forces (e.g., friction, gravitational, magnetic) on the position, speed, and direction of motion of objects.
S:PS3:8:2.1. Motion: Students will explain that an object in motion that is unaffected by a force will continue to move at a constant speed and in a straight line.