Khan Academy Static

Why do things move in circles? Seriously. Why does *anything* ever move in a circle (straight lines seem much more natural)? Is something moving in a circle at a constant speed accelerating? If so, in what direction? This tutorial will help you get your mind around this super-fun topic.

9970_Centripetal_force_and_acceleration_intuition.html

9973_Calculus_proof_of_centripetal_acceleration_formula.html

9974_Loop_de_loop_question.html

9975_Loop_de_loop_answer_part_1.html

9971_Visual_understanding_of_centripetal_acceleration_formula.html

9976_Loop_de_loop_answer_part_2.html

9969_Race_cars_with_constant_speed_around_curve.html

9972_Optimal_turns_at_Indianapolis_Motor_Speedway_with_JR_Hildebrand.html