CP Ch01.6 Static Equilibrium

What is mechanical equilibrium?

• A state of unsteadiness

• A state of steadiness where physical changes occur

• A state of steadiness where no physical changes occur

• A state of imbalance

What does the sum of upward tensions equal to in a scenario with sign painters on a scaffold?

• Sum of downward weights

• Sum of lateral forces

• Sum of upward forces

• Sum of frictional forces

What is the gravitational force acting on the bag of sugar?

• 1 pound

• 5 newtons

• 2 pounds

• 10 newtons

What force does a 2-pound bag of sugar hanging from a spring-based weighing scale experience?

• Compression force

• Tension force

• Frictional force

• Gravitational force

What is the mathematical expression for the equilibrium rule?

• ∑ F = 0

• ∑ F = ma

• F = ma

• F = 0

What does the equilibrium rule state?

• The vector sum of forces on an object must be zero for it to be in equilibrium.

• The vector sum of forces on an object must be non-zero for it to be in equilibrium.

• The vector sum of forces on an object must be negative for it to be in equilibrium.

• The vector sum of forces on an object must be positive for it to be in equilibrium.

What is the condition for an object to be in static equilibrium?

• The net force on the object is zero

• The object is moving at a constant velocity

• The object is accelerating

• The object is rotating