The only force acting on a particle is conservative force . If the particle is at point A, the potential energy of the system associated with and the particle is 41 J. If the particle moves from point A to point B, the work done on the particle by is 20 J. What is the potential energy of the system with the particle at B

Explanation:

The final potential energy is modelled according to the Principle of Energy Conservation and the Work-Energy Theorem:

The conservative nature of the work done on the particle means that additional work is gained by the system, meaning a positive change in potential energy. Then:

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

i think it would be 5