Chapter 2 Mechanical Equilibrium Review

Fill in the blank: The combination of all forces acting on an object is called the ________.

• Scalar

• Vector

• Net force

• Equilibrium

What is a vector?

• A) A quantity with only magnitude

• B) A quantity with magnitude and direction

• C) A quantity with only direction

• D) A quantity with no magnitude or direction.

A scalar quantity can be described by magnitude only. True or False?

• True

• False

Fill in the blank: A support force is often called the ________.

• Gravitational force

• Normal force

• Frictional force

• Tension force

What happens when the net force on an object is zero?

• The object accelerates

• The object is in mechanical equilibrium

• The object changes direction

• The object increases speed.

Fill in the blank: An object in mechanical equilibrium is stable, without changes in ________.

• Mass

• Volume

• Motion

• Temperature

Fill in the blank: A vector quantity needs both magnitude and ________ for a complete description.

• A) Mass

• B) Direction

• C) Volume

• D) Temperature

Which of the following is an example of mechanical equilibrium? A) A car accelerating B) A book lying on a table C) A ball falling D) A rocket launching.

• A car accelerating

• A book lying on a table

• A ball falling

• A rocket launching

What does the diagonal of the parallelogram represent in the parallelogram rule?

• The sum

• The difference

• The resultant

• The average

When two or more vectors are combined, the result is called the ________.

• sum

• difference

• resultant

• product