A merry-go-round spins freely when Diego moves quickly to the center along a radius of the merry-go-round. As he does this, it is true to say that
A) the moment of inertia of the system decreases and the angular speed remains the same.
B) the moment of inertia of the system decreases and the angular speed decreases.
C) the moment of inertia of the system decreases and the angular speed increases.
D) the moment of inertia of the system increases and the angular speed increases.
E) the moment of inertia of the system increases and the angular speed decreases.
Question 2
A 5.0-N projectile leaves the ground with a kinetic energy of 220 J. At the highest point in its trajectory, its kinetic energy is 120 J. To what vertical height, relative to its launch point, did it rise if there was no air resistance?
A) 44 m
B) 24 m
C) 20 m
D) 10 m
E) It is impossible to determine the height without knowing the angle of launch.
DIEGO EL CIGALA
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Making moves