A 20-Kg Block Slides Down a Fixed,rough Curved Track

question 47

Multiple Choice

A 2.0-kg block slides down a fixed,rough curved track.The block has a speed of 5.0 m/s after its height above a horizontal surface has decreased by 1.8 m.Assume the block starts from rest.What is the change in mechanical energy of the block caused by the force of friction during this descent?

• A)-14 J
• B)-12 J
• C)-10 J
• D)-16 J
• E)-25 J

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Definitions:

Passbook Savings Accounts

A type of savings account where transactions are recorded in a physical booklet, traditionally offering low interest rates.

Double Coincidence of Wants

A situation in a barter system where two parties each hold an item the other wants, allowing them to exchange goods directly without the need for money.

M1

A category of the money supply that includes physical currency and coin, demand deposits, traveler's checks, and other checkable deposits.

Travelers Checks

Pre-printed, fixed-amount checks designed to allow the person signing them to make an unconditional payment to someone else as a result of having paid the issuer for that privilege.