A box with mass 15.0 kg moves on a ramp that is inclined at an angle of 55.0∘ above the horizontal. The coefficient of kinetic friction between the box and the ramp surface is μk = 0.300.
a. Calculate the magnitude of the acceleration of the box if you push on the box with a constant force 190.0 N that is parallel to the ramp surface and directed down the ramp, moving the box down the ramp.
Express your answer with the appropriate units.
b. Calculate the magnitude of the acceleration of the box if you push on the box with a constant force 190.0 N that is parallel to the ramp surface and directed up the ramp, moving the box up the ramp.
Express your answer with the appropriate units.
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