Untitled Flashcards Set

A particle is in equilibrium in an inertial frame of reference if the vector sum of all the forces acting on the particle is __________.

zero.

For an extended object to have zero acceleration, the vector sum of all __________ acting on the object must be zero.

external forces

The first condition for equilibrium states that the net external force on an object at rest must be __________.

zero.

The second condition for equilibrium requires that the sum of external __________ must be zero about any point for an object in equilibrium.

torques

A rigid body not rotating around a certain point has __________ angular momentum about that point.

zero

For an object to remain nonrotating, the net external torque around any point must be __________.

zero.

The first condition for equilibrium relates to the __________ of an object remaining at rest.

center of mass

It is often called the __________ condition for equilibrium that the net external force must be zero.

first

The __________ condition for equilibrium relates to the object's tendency to rotate.

second

According to the second condition for equilibrium, the rate of change of angular momentum must be __________.

zero.