you could make a self propelled car all you need is cardboard, wheels, and a balloons or rubber bands
Answer: yes a quantity have different dimensions in different system of units . No,because in different system of units doesn't change the quantity but it only changes the numerical.
Good luck !
Answer:
![92.25 kgm^2](https://tex.z-dn.net/?f=92.25%20kgm%5E2)
Explanation:
Assume both children bodies are point particles. The total moment of inertia about the rotation axis of 2 points particles of mass 16 kg and 25 kg at 1.5 m arm length is
![\sum I = m_1r_1^2 + m_2r_2^2](https://tex.z-dn.net/?f=%5Csum%20I%20%3D%20m_1r_1%5E2%20%2B%20m_2r_2%5E2)
where
are the masses of 2 children
are their distance to the center of rotation
![\sum I = 16*1.5^2 + 25*1.5^2 = 1.5^2(16 + 25) = 92.25 kgm^2](https://tex.z-dn.net/?f=%5Csum%20I%20%3D%2016%2A1.5%5E2%20%2B%2025%2A1.5%5E2%20%3D%201.5%5E2%2816%20%2B%2025%29%20%3D%2092.25%20kgm%5E2)