Read the following scenario. Kelley chooses to move a bookshelf in his room so that he can better access it. He wants to start by moving it into the center of the room. Standing behind it, he begins to push. Based on this information, which of the following statements is correct?(1 point)It will move to the left because of its magnitude. It will move forward due to an unbalanced force..It will move to the right due to a balanced force..It will stay still because of the bookshelf’s gravity.

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?

What energy transformations occur each time the skateboarder rolls up the ramp?