CH 8 - Rotational Motion Flashcards
Circular Motion
A tapered cup will move in a circle with the smaller diameter
A tapered cup will move in a circle with the smaller diameter towards the center because it will travel less..
Rotational Inertia
The greater the distance of mass concentration, the greater the resistance to rotation.
rotational inertia (moment of inertia)
Torque
Torque (or Moment) is the rotational counterpart of force
Torque Formula
Torque = lever arm x force
The placement of hand determines the magnitude of the ?
torque for the same effort
Centers of Mass and Gravity
The average position of mass distribution in an object regardless the influence of gravity.
The center of mass can be outside of the mass of body but
as long as it lays above the base of support the body is in stable equilibrium
Pregnant womens center of gravity changes over time because
Centers of Mass and Gravity
They arch their backs the support over their feet.
Women have a higher center of grsvity then
Men
Centripetal Force
Any force directed toward a fixed center is called a centripetal force.
Centri =
Petal =
Centri = Center
Petal = Seeking
Centripetal = center skeeing
A car going around a curve is pushed toward the center of the curve by a centripetal force.
Skidding occurs when the force is not strong enough, such as on an icy road.
Centrifugal Force
The apparent outward force centrifugal force is called centrifugal force.
Centri =
Fugal =
Centri = center
Fugal = fleeing
Centrifugal = center fleeing
Centri =
Fugal =
Centri = center
Fugal = fleeing
Centrifugal = center fleeing
