Agirl exerts a horizontal force of 109 n on a crate with a mass of 31.2 kg. hint (a) if the crate doesn't move, what's the magnitude of the static friction force (in n)? 109 correct: your answer is correct. the static friction force is fs ≤ μsn. for an object with no acceleration at rest on a surface, fs equals the particular value required to keep the object at rest on the surface. n (b) what is the minimum possible value of the coefficient of static friction between the crate and the floor? (assume the crate remains stationary.)

From center station, a train departs every 30 minutes on the fast line and a train departs every 50 minutes on the state line. if two trains depart from center station at 8: 00 a. m., one on each of the two lines, what is the next time that two trains, one on each line, will depart at the same time?

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)

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?