Author Question: A crate is sliding down an inclined ramp at a constant speed of 0.55 m/s. The vector sum of all the ... (Read 30 times)

swpotter12 · **on:** Jul 29, 2018

A crate is sliding down an inclined ramp at a constant speed of 0.55 m/s. The vector sum of all the forces exerted on this crate must point

A) down the ramp.
B) up the ramp.
C) perpendicular to the ramp.
D) vertically downward.
E) None of the above choices is correct.

Question 2

Talk-radio station KOOK is at approximately 90 megahertz on the radio dial. This means that KOOK broadcasts

A) an electromagnetic wave whose frequency is 90 vibrations/second.
B) an electromagnetic wave whose frequency is 90 106 vibrations/second.
C) an electromagnetic wave whose wavelength is 90 106 vibrations per second.
D) a sound wave whose frequency is 90 106 vibrations/second.
E) a sound wave whose frequency is 90 vibrations/second.