If one holds one end of the clothesline taut and wiggles it up and down sinusoidally with frequency 2.00 Hz, the amplitude is 0.075 m. The wave speed on the clothesline is 12 m/s. At , we have maximum positive displacement at position and the velocity is zero. Assume that no wave bounces back from the far end. (a) Find the wave amplitude , angular frequency , period , wavelength and wave number . (b) Find a wave function describing the wave. (c) Find equations for the displacement, as a function of time, of the particle at and of a point at 3.00 m.

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)

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)