12. Four boys ride the playground merry-go-round. They all have the same mass. Which boy will have the fastest linear speed?
A. Paul
B. George
C. Ringo
D. All boys will have equal rotation speeds on the merry-go-
round.

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?

Explain what happens at the saturation point when adding salt to water at room temperature.