Question

Physics help needed

Answer 1

i got the answer but have no clue how to solve it.

Answer 2

tried using conservation of momentum and conservation of energy, get 2 equations, 3 unknowns.

Answer 3

I think were assuming the rod can rotate around its center

Answer 4

i think we know that

1/2mV^2=1/4ML^2w^2
mvL/4=1/12ML^2w

Answer 5

the kinetic energy of spherical ball gets split into rotational kinter energy, and translational kinetic energy of the bar, right ?

Answer 6

yes

Answer 7

i think its only rotational in this case

Answer 8

the bar is fixed

Answer 9

\[\dfrac{1}{2}mv^2 = \dfrac{1}{2}{mv_{cm}}^2 + \dfrac{1}{2}I\omega^2\]

Answer 10

Oh how do you know the bar is fixed ?
that isn't mentioned in the question ?

Answer 11

there would be no way to do the problem if it wasnt fixed.

Answer 12

\[m_bv_b(\frac{ L }{ 4 })=\frac{ 1 }{ 12 }m_rL^2w\]

Answer 13

\[m_bV_b^2=\frac{ 1 }{ 12 }m_rL^2w^2\]

Answer 14

\[\frac{ m_b }{ m_r }=\frac{ Lw }{ 3V_b }\]

Answer 15

im running out of time guys.

Answer 16

try @ParthKohli or @Michele_Laino