PHYS 1210: Statics and Torque (Chapter 9)

A body is said to be in equilibrium when:

Net force and torque are zero

Which condition ensures translational equilibrium?

∑F = 0

A body can have ∑F = 0 but still rotate because:

Net torque is not zero

Torque depends on:

Force, distance, and angle

The SI unit of torque is:

N * M

Maximum torque is produced when the angle between force and lever arm is:

90 degrees

If a force is applied closer to the pivot, torque will:

Decrease

Rotational equilibrium occurs when:

*put a T for Tau

∑T = 0

In static equilibrium:

Both linear and angular accelerations are zero

Which equilibrium allows motion at constant velocity?

Dynamic equilibrium

A system returns to its original position after displacement. This is:

Stable equilibrium

If a small displacement causes a body to move further away from equilibrium, it is:

Unstable

In a lever, mechanical advantage (MA) is given by:

Fo / Fi

If the center of gravity lies between two supports, then:

Both forces are upward

If the center of gravity lies outside the supports:

One force may act downward