The eighth season of American Idol premiered on January 13, 2009, and concluded on May 20, 2009. Judges Simon Cowell, Paula Abdul, and Randy Jackson continued to judge the show's contestants, along with Ryan Seacrest as host. Jamar Rogers, who was cut in the green mile round in this season of American Idol, would go on as contestant on the second season of NBC 's The Voice and made it to the Semi-Final round before being eliminated.
The forces acting on a falling leaf are A. air resistance and fluid friction. B. gravity and air resistance. C. gravity and static friction. D. weight and rolling friction. The forces acting on a falling leaf are : gravity and air resistance.
Forces that are equal in size but opposite in direction are called balanced forces. Balanced forces do not cause a change in the motion of objects. Forces that cause a change in motion of objects are called unbalanced forces. Unbalanced forces can change the motion of an object in two ways.