Determine the rotational inertia of the construction about an axis perpendicular to the picture and passing through point b.

m* 8.0 kg*m²

Explanation:

Rotational inertia of a set of discrete masses (considered point masses), regarding an axis passing through a given point, is just the sum of the products of each mass times the distance to the point of interest.

In the attached picture, neglecting the masses of the rods joining the masses, and taking into account that all masses are equal each other, being  equal to m kg, we can write the following equation:

I = m₁*r₁² + m₂*r₂² + m₃*r₃² + m₄*r₄²,  

⇒ I = m kg*0 +m kg*2 m² +m kg*2m² + mkg*4m²

⇒ I = m*8 kg*m²

the pull of gravity on the rocket decreases

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation: