Show that the apparent weight w^1 of a lift that is accelerated upward can be written as w^1=m(g+a)

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?