Which of the following statements are true. (justify your answer to get credit) (5 points)

1. mechanical energy is conserved before and after the string is cut.
2. mechanical energy is conserved before the string is cut.
3. mechanical energy is conserved after the string is cut
4. linear momentum is conserved 5. angular momentum is conserved.

2 & 3

Explanation:

Since they are all vector quantities, if they remain in a closed system where no external force acts on the system, the vector sum of the momentum remains constant.

When there is no loss or gain in the total vector sum of the energy of the system means it's energy is conserved.

i would think form in reponse to tensional forces

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force