2. a block of mass 100. kg is placed on an inclined plane with a
slope of 35.0° to the horizontal, and is connected to a second
hanging block of unknown mass by a cord over a small
frictionless pulley. the coefficient of kinetic friction is 0.300.
a. calculate the mass of the hanging block if the 100.kg
block slides up the plane at a constant velocity.

b. calculate the mass of the hanging block if the 100 kg block slides down the
plane at a constant velocity

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

Which of the following are appropriate acceleration units?

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?