An Atwood machine consists of a mass of 3.5 kg connected by a light string to a mass of 6.0 kg over a frictionless pulley with a moment of inertia of 0.0352 kg m2 and a radius of 12.5 cm.
If the system is released from rest, what is the speed of the masses after they have moved through 1.25 m if the string does not slip on the pulley? A) 2.0 m/s
B) 2.3 m/s
C) 4.0 m/s
D) 5.0 m/s
E) 6.0 m/s
Question 2
An object weighs 432 N on the surface of the earth. The earth has radius R. If the object is raised to a height of 3R above the earth's surface, what is its weight?
A) 108 N
B) 48.0 N
C) 27.0 N
D) 305 N
E) 144 N