Question

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.

Answer 1

2 & 3

Step-by-step 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.