when there is no external torque acting on a rotating body, which of the following will change
1) angular momentum 2)angular speed and why?
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if external torque zero , then angular momentum will be conserved . e.g angular momentum will be constant .
but angular velocity or speed may be change ,
so , option (2) is correct ,
explanation :-
dL/dt = external torque
where dL is change in angular momentum .
if external torque = 0
dL/dt = 0
L = constant ( let K)
dL = K
Li =Lf
hence , angular speed may change
but angular velocity or speed may be change ,
so , option (2) is correct ,
explanation :-
dL/dt = external torque
where dL is change in angular momentum .
if external torque = 0
dL/dt = 0
L = constant ( let K)
dL = K
Li =Lf
hence , angular speed may change
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