A bicycle wheel has a diameter of 64.6 cm and a mass of 1.70 kg. Assume that the wheel is a hoop with all of the mass concentrated on the outside radius. The bicycle is placed on a stationary stand and a resistive force of 120 N is applied tangent to the rim of the tire. a) What force must be applied by a chain passing over a 9.07 cm diameter sprocket if the wheel is to attain an acceleration of 4.53 rad/s^2 ?
b) What force is required if the chain shifts to a 5.51 cm diameter sprocket?

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p