QUESTION 1 (Show your work)
mi
R
Two children, of masses m1 = m2 = 20 kg,
ride on the perimeter of a small merry-
go-round. The merry-go-round is a disk
of mass M = 30 kg
and radius R = 3 m, as shown in the figure
below.
The moment of inertia of the system
(merry-go-round, child 1, child 2) about
the center of the merry-go-round is
equal to:
M M
m2

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative