Plz help ( steps plz )

The velocity of mass 3 kg is given by ( 6x - 2y) m/s if the
velocity change to ( 8x + 4y) m/s. Find the force that
applied on this object to move 2.25 m.

1. Why if the object moves as projectile the x component of thevelocity is constant and the y component change at the samerate?
2. We can say that when any object is falling the rate weight/massfor this object is constant. Why we can say that?

The figure shows the velocity graph of a 2.7 kg object as it moves along the x-axis.

A) What is the net force acting on this object at t = 1 s?

B) At 4 s?

C) At 7 s?

The figure shows the velocity graph of a 2.7kg object as it moves along the x-axis.

A) What is the net force acting on this object at t= 1 s?

B) At 4 s?

C) At 7 s?