AP EAMCET Engineering 22 Sep 2020 Shift 2 Paper

Torque acting upon a rotating body is given as τ=‌

dL

dt

where, L= angular momentum. When τ=0, thenwhere, L= angular momentum.
When τ=0, then
‌

dL

dt

=0
⇒ L− constant
Hence, when the torque acting upon a system is zero, then its angular momentum remains constant.