Question

In a charming 19th-century hotel, an old-style elevator is connected to a counterweight by a cable that passes over a rotating disk 3.50 in diameter (the figure ). Theelevator is raised and lowered by turning the disk, and the cable does not slip on the rim of the disk but turns with it. hrough what angle (in radians ) has the diskturned when it has raised the elevator 3.05 between floors?

Answer 1

given that
radiusa of disk = 3.50m/2 = 1.75m
s= 2.5m
from the relation s = ?r
? = s/r
= 3.05m/ 1.75m = 1.74rad

Answer 2

1) The relationship is ?=v/r
v=0.35 m/s
r=3.50
Your answer will be in radians/second: convert to RPM using the fact that 1rad/s=60/2p=30/p RPM.
2) The relationship is ?=d/r and the answer will be in radians
3) Convert radians to degrees using the fact that 1rad=360/2p=180/p degrees.

Answer 3

Get rekt son