centripetal acceleration. acceleration in a circular path at constant speed a c =(v t 2 )/r...
Post on 16-Dec-2015
215 Views
Preview:
TRANSCRIPT
Centripetal Acceleration
Centripetal Acceleration
• Acceleration in a circular path at constant speed
• ac=(vt2)/r
• Centripetal acceleration=(tangential speed)2/radius of circular path
• Centripetal acceleration is always directed toward the center
Centripetal Force
• The net force that is directed toward the center of an object’s circular path
• Fc=mvt2/r
• Centripetal force=mass x (tangential speed)2/ radius of circular path
Torque
• Torque a quantity that measures the ability of a Force to rotate an
object around an axis
Torque = Force x lever arm x sin qt = Fdsinq Measured in Nm.
Maximum Torque occurs at 900.
To increase Torque- increase either Force or lever arm distance or both.
• For a system to be balanced, the torques must be balanced.
t (clockwise) = t (counter-clockwise)
Ex: Two students sitting on a see-saw. One student m=40 kg, d = 3 m. Second student m=45 kg, d = ?
top related