If it were possible to remove gravity and friction, think about what would happen to a football if it were tossed into the air. which statement best describes the force(s) acting on the football? a force must be applied to it when it slows to a position of rest. a force must be applied to it before it slows to a position of rest. no force is needed; an object in motion stays in motion. many forces must act upon it to keep it in motion.

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

What is the final velocity of the initial velocity of 25 and -50?