An Ore Car of Mass 2000 Kg Rolls Downhill on Tracks

question 3

Multiple Choice

An ore car of mass 2000 kg rolls downhill on tracks from a mine.At the end of the tracks,10.0 m lower in elevation,is a spring with k = 400,000 N/m.How much is the spring compressed in stopping the ore car? Ignore friction.

• A) 0.14 m
• B) 0.99 m
• C) 1.40 m
• D) 1.96 m

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Definitions:

Opiate

A group of drugs derived from opium, used for pain relief, but also associated with addiction and dependence.

Excitatory Messages

Neurological signals that increase the likelihood of a neuron firing and thus stimulate action in the nervous system.

Inhibitory Message

A neurological or psychological signal that reduces or prevents certain actions, thoughts, or feelings.

Refractory Period

A resting period after orgasm, during which a man cannot achieve another orgasm.