You get into an elevator and step onto a bathroom scale, which shows you weigh 150 pounds. The doors close, and the elevator starts to move, very smoothly. You look down, and notice that your weight is now 155 pounds. What can you say about the motion of the elevator? (A) It is moving upward, but slowing down.
(B) It is moving downward, and speeding up.
(C) It is moving downward, but slowing down.
(D) It is moving upward, at a constant speed.

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

An electron is traveling with initial kinetic energy k in a uniform electric field. the electron comes to rest momentarily after traveling a distance d. (a) what is the magnitude of the electric field

What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight