CP Ch01.8 Dynamic Equilibrium

What is required for equilibrium according to the text?

• One force

• No force

• Two or more forces

• Three forces

Why can't an object under the influence of only one force be in equilibrium?

• Because the net force is always zero in equilibrium

• Because the object will accelerate in the direction of the force

• Because the object will decelerate in the direction of the force

• Because net force couldn't be zero

What does testing for equilibrium involve?

• Noting whether or not an object undergoes changes in motion

• Measuring the weight of an object

• Calculating the speed of an object

• Determining the color of an object

What is dynamic equilibrium in mechanical equilibrium?

• A state of no motion with forces adding up to zero

• A form of mechanical equilibrium with motion and forces adding up to zero

• A state of constant acceleration with forces adding up to zero

• A form of mechanical equilibrium with no motion and forces not adding up to zero

According to Newton's first law, what do the forces on a moving object in dynamic equilibrium add up to?

• Zero

• Infinity

• One

• Two

What type of equilibrium are objects at rest and objects moving at constant velocity in?

• Static equilibrium

• Dynamic equilibrium

• Thermal equilibrium

• Chemical equilibrium

What type of equilibrium are objects at rest and objects moving at constant speed in a straight-line path in?

• Static equilibrium

• Dynamic equilibrium

• Thermal equilibrium

• Chemical equilibrium