(Figure 1)Block 1, of mass m1 = 0.500 kg , is connected over an ideal (massless and frictionless) pulley to block 2, of mass m2, as shown. For an angle of θ = 30.0 ∘ and a coefficient of kinetic friction between block 2 and the plane of μ = 0.250, an acceleration of magnitude a = 0.500 m/s2 is observed for block 2.

Figure1 of 1
The figure shows two blocks, with masses m 1 and m 2, connected by a rope that goes over a pulley located at the top of the inclined plane. The block with mass m 1 is suspended by a rope, and the block with mass m 2 lies on the inclined plane with coefficient of friction mu. The inclined plane makes an angle theta with the horizontal. Accelerations of both blocks have magnitude a. The acceleration of the block with mass m subscript 1 is directed downwards, and the acceleration of the other block is directed towards the pulley along the inclined plane.
Part A
Find the mass of block 2, m2.
Express your answer numerically in kilograms.