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5. Suppose a piece of dust finds itself on a CD. If the spin rate of the CD is 500 rpm, and the piece of dust is 4.3 cm from the center, what is the total distance (in meters) traveled by the dust in 3 minutes? (Ignore accelerations due to getting the CD rotating.) 1 rev 2π radians. Use the set of kinematics equations for circular motion to solve this. ANS 405 m 6. Three children are riding on the edge of a and is spinning at 20.0 rpm. The children have masses of 22.0, 28.0, and 33.0 kg. If the child who has a mass of 28.0 kg moves to the center of the merry-go-round, what is the new angular velocity in rpm? ( 1rev 2π radians) ANS 25.3 rpm merry-go-round that is 100 kg, has a 1.60-m radius 7. If the pressure of an object at a certain point in a liquid is Pi, then the pressure P at a depth of h" will be given by? ANS) Pipgh 8. Archimedes' principle can be used to calculate the density of a fluid as well as that of a solid Suppose a chunk of iron (density of iron is 7.8 g/em) with a mass of 390.0 g in air is found to have an apparent mass of 350.5 g when completely submerged in an unknown liquid. Calculate the fluid's density (in g/cm)? ANS -0.79 g/em

Answer 1