A force is an agency or influence that, if applied to a free body, results in an acceleration of the body.
Gravity is such a force.
As the force of gravity on a body increases, the acceleration of the body increases. Air resistance and friction act as counterforces to gravity. Materials Procedures Adaptations Discussion Questions Extensions Evaluation Suggested Readings Links Vocabulary Academic Standards Credit Printable version of the lesson plan in rich text format. Use our Teaching Tools to create custom worksheets, puzzles and quizzes about this topic. Back to Top 1.