A Mass Is Pressed Against (But Is Not Attached To)an

question 36

Multiple Choice

A mass is pressed against (but is not attached to) an ideal horizontal spring on a frictionless horizontal surface.After being released from rest,the mass acquires a maximum speed v and a maximum kinetic energy K.If instead the mass initially compresses the spring twice as far,

• A) its maximum speed will be 2v and its maximum kinetic energy will be 2K.
• B) its maximum speed will be 2v and its maximum kinetic energy will be K.
• C) its maximum speed will be v and its maximum kinetic energy will be 2K.
• D) its maximum speed will be 2v and its maximum kinetic energy will be 4K.
• E) its maximum speed will be 4v and its maximum kinetic energy will be 2K.

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