A 20-Kg Block Is Attached to One End of a Spring

question 88

Multiple Choice

A 2.0-kg block is attached to one end of a spring with a spring constant of 100 N/m and a 4.0-kg block is attached to the other end.The blocks are placed on a horizontal frictionless surface and set into motion.At one instant the 2.0-kg block is observed to be traveling to the right with a speed of 0.50 m/s and the 4.0-kg block is observed to be traveling to the left with a speed of 0.30 m/s.Since the only forces on the blocks are the force of gravity, the normal force of the surface, and the force of the spring, we conclude that:

• A)the spring is compressed at the time of the observation
• B)the spring is not compressed at the time of observation
• C)the motion was started with the masses at rest
• D)the motion was started with at least one of masses moving
• E)the motion was started by compressing the spring

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Definitions:

Journal Entries

Records in accounting that document every transaction affecting a company's financial position, detailing debits and credits to accounts.

Ledger Accounts

Individual records for each account in a company's financial statements, tracking all transactions affecting that account.

Chart of Accounts

An organized list of all the accounts in a company's general ledger which are used to categorize transactions.

Ledger

A comprehensive collection of all accounts and financial transactions of a company, organization, or individual.