PS(12/10/24): (1)Describing Static Principles

What is the study of forces in equilibrium called?

• Dynamics

• Kinetics

• Statics

• Thermodynamics

What does equilibrium mean in the context of forces?

• The sum of all forces and moments acting on an object is greater than zero.

• The sum of all forces and moments acting on an object is less than zero.

• The sum of all forces and moments acting on an object equals zero.

• The sum of all forces and moments acting on an object is infinite.

Why is understanding statics important for engineers?

• To design structures that can move quickly.

• To predict and design structures that can withstand forces without collapsing.

• To create structures that are aesthetically pleasing.

• To develop new materials for construction.

Diagram of a seesaw with twins on either side, illustrating equilibrium of moments.

• The seesaw is balanced because the twins have equal weight and are equidistant from the fulcrum.

• The seesaw is balanced because one twin is heavier but sits closer to the fulcrum.

• The seesaw is balanced because the twins are sitting at different distances from the fulcrum.

• The seesaw is balanced because the fulcrum is not centered.

What does it mean when forces are in equilibrium?

• Forces are balanced and there is no net force.

• Forces are unbalanced and there is a net force.

• Forces are only acting in one direction.

• Forces are increasing in magnitude.

Which of the following is a real-life example of forces in equilibrium?

• A book resting on a table.

• A car accelerating on a highway.

• A ball rolling down a hill.

• A person jumping off a diving board.

What does it mean when forces are in equilibrium?

• All forces acting on an object are balanced, resulting in no net force or motion.

• Forces are unbalanced, causing the object to accelerate.

• Only gravitational forces are acting on the object.

• The object is moving at a constant speed.

Which of the following is a real-life example of forces in equilibrium?

• A car accelerating on a highway.

• A book resting on a table.

• A ball rolling down a hill.

• A plane taking off from a runway.

What is a force measured in?

• Joules (J)

• Newtons (N)

• Watts (W)

• Pascals (Pa)

Which of the following is an example of a contact force?

• Gravitational force

• Magnetic force

• Tension

• Electric force