A box of mass 2.1 kilogram is on a horizontal surface. The coefficient of friction between the surface and the box is 0.32. You are able to apply a push of 26 Newton acting at an angle 33 degree below the horizontal. The box initially is at rest.
(a) Evaluate the acceleration of the box.
(b) Find the speed of the box after it has travelled a distance of 2.3 meter?
(c) If you instead pulled upwards on the box with the same force at the same angle above the horizontal, would your answers change?