A 25.0-kg box is pushed up a ramp for a (slant) distance of 4.00 m at a constant speed of 10.0 cm/s. The ramp is tilted at an angle of 210 to the horizontal. The frictional force is 2.5 N. How much higher is the box at the end? How much force is needed to move the box? What is the kinetic energy of the box as it moves? How much potential energy has been added to the box when it reaches the end of the ramp? If the box falls off the end of the ramp to it's original height, what is its kinetic energy when it reaches the ground