5.0 kg and 7.0 kg weight are placed on opposite ends of a massless 4.0 m rod (5.0 kg on the left, 7.0 kg on the right). determine the total moment of inertia of the system and net torque if
the axis of rotation is halfway between the two masses
the axis of rotation is 0.50 m to the left of the 7.0 kg weight.
which axis of rotation produces the most torque and why?

Explanation:

I = m₁ r₁² + m₂ r₂²

I = (5.0 kg) (2.0 m)² + (7.0 kg) (2.0 m)²

I = 48 kg m²

I = m₁ r₁² + m₂ r₂²

I = (5.0 kg) (3.5 m)² + (7.0 kg) (0.5 m)²

I = 63 kg m²

The second system has the higher moment of inertia because the axis of rotation is further from the center of gravity.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.