when forces on an object are acting in the same direction, how do you add them together to find the net force?

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

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.