A Block of Mass M_b Rests on a Horizontal Surface

question 4

Multiple Choice

A block of mass m_b rests on a horizontal surface and is accelerated by means of a horizontal cord that passes over a frictionless peg to a hanging weight of mass m_w.The coefficient of kinetic friction between the block and the horizontal surface is µ and the tension in the cord is T.The acceleration of the block is given by

• A)(T - m_wg)/(m_w + m_b)
• B)T/(µm_bg + m_b)
• C)(T - µm_b)/m_b
• D)(m_wg - T)/m_w
• E)T/m_b - µm_bg

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Definitions:

Compile Time

The phase in which a program's source code is converted into executable code by a compiler, before the program is run.

Execution Time

The total time required for a computer program or specific block of code to complete execution.

Multiple Inheritance

A feature of some object-oriented programming languages in which a class can inherit behaviors and attributes from more than one parent class.

Polymorphic Reference

A reference variable in object-oriented programming that can refer to objects of different classes at different times during the execution of a program.