Work dU=F*dr=Fdscos( theta ) [J] dU is+ if theta is acute and if theta is obtuse if F has same dir of dr: DU=Fds F has opposite direction of dr: du=-Fds If F is perpendicular to dr: dU=0
Conservative Forces: Conservative if work is independent of Path t
Translation: body maintains same direction of motion all points on the body in translation have same velocity and acceleration
rB=rA if rB/A is constant, same velocity and acceleration Rotation about fixed axis Particles move along curves and all the cu
Forces for plane motion Forces will cause translation and rotation
If body is unconstrained, the center of mass will go through translation and other points on body will go through general plane motion Newtons law should be used only about the center of
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