2.0 kg block of wood is attached to an unknown mass by a wire that passes without friction on a pulley. If the flat surface is tilted 20 from the horizontal and the coefficient of friction between the surface and the wooden block is 0.35, what minimum mass will allow the blocks to move with an acceleration of 1.25 m/s2? The missing weight of the second object should be less than the first one. Since the first weight(2.0kg) is pulling the second one upwards