Tierra pushes on a 1000 N crate with a force of 200 N to the right. The crate does not move. What are both the normal force and the force of friction?

A. FN = 200 N up; FF = 1000 N left
B. FN = 1000 N down; FF = 200 N right
C. FN = 1000 N up; FF = 200 N right
D. FN = 1000 N up; FF = 200 N left

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?

"if the pressure acting on an ideal gas at constant temperature is tripled, its volume isa) reduced to one-third.b) increased by a factor of three.c) increased by a factor of two.d) reduced to one-half"