A Solid Sphere of Mass 2 $\degree$ And Rolls to the Bottom

question 37

Multiple Choice

A solid sphere of mass 2.5 kg and radius 0.12 m starts from rest at the top of a ramp inclined 15 $\degree$ and rolls to the bottom. The upper end of the ramp is 1.2 m higher than the lower end. What is the linear speed of the sphere when it reaches the bottom of the ramp? (Note: I = 0.4MR² for a solid sphere, and g = 9.8 m/s².)

• A) 4.1 m/s
• B) 4.7 m/s
• C) 3.4 m/s
• D) 2.4 m/s

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Definitions:

Roundworm

Invertebrates with nonsegmented cylindrical body covered by a cuticle that molts; some forms are free-living in water and soil, and many are parasitic.

Freshwater Hydra

A small, tentacled, aquatic organism found in freshwater, known for its extraordinary ability to regenerate.

Medusa

Among cnidarians, bell-shaped body form that is directed downward and contains much mesoglea.

Polyp

Among cnidarians, body form that is directed upward and contains much mesoglea. In anatomy: small, abnormal growth that arises from the epithelial lining.