A Particle That Is Moving Along a Straight Line Decelerates

question 29

Multiple Choice

A particle that is moving along a straight line decelerates uniformly from 40 cm/s to 20 cm/s in 5.0 s and then has a constant acceleration of 20 cm/s² during the next 4.0 s.The average speed over the whole time interval is

• A)57 cm/s
• B)140 cm/s
• C)86 cm/s
• D)43 cm/s
• E)97 cm/s

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Definitions:

Estimate Interest

An approximation of the interest amount over a certain period based on a given rate.

Shortcut

A direct route or method that reduces the time or effort to complete a task.

Ordinary Simple Interest

Interest calculated on the principal amount of a loan or investment, based on a simple calculation and not compounded.

360-Day Year

A simplified accounting method that assumes there are 360 days in a year, used for calculating interest and other financial metrics.