Determine el trabajo que una persona debe efectuar sobre su mochila que transporta alimentos de 15 kg para llevarla a la cima de una colina de altura h = 20 m como se observa en la figura (4 Pts.)

i think the answer is a, hope this is right, that would be my best guess.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.