Why the angular momentum of the body cannot be zero if the net external force is not equal to zero?

Open in App

Solution

$W e k n o w t h a t, τ = d L / d t, w h e r e τ = t o r q u e a c t i n g o n t h e p a r t i c l e, a n d d L / d t i s t h e r a t e o f c h a n g e o f a n g u l a r m o m e n t u m . I n c a s e τ i s n o t = t o z e r o t h e n d L / d t i s a l s o n o t = t o z e r o, s o, L i s n o t c o n s \tan t, i t m e a n s i f i n t h e a b s e n c e o f t o r q u e, L w a s z e r o t h e n n o w L w i l l n o t r e m a i n z e r o a n d i f L h a d s o m e v a l u e, n o w n o t n e c e s s a r i l y t h a t i s m a i n t a i n e d . T h e r e f o r e i f τ i s n o t z e r o t h e n a n g u l a r m o m e n t u m i s n o t c o n s \tan t .$

Suggest Corrections

Similar questions

If net external force on a body adds up to zero, which of the following statements are not necessarily true?

Join BYJU'S Learning Program