In Figure a, a constant horizontal force Fa is applied
In Figure a, a constant horizontal force Fa is applied to block, 4, which pushes against block B with a 20.0N force directed horizontally to the right. In Figure b, the same force Fa is applied to block B; now block, A pushes on block B with a 10.0 N force directed horizontally to the left. The blocks have a combined mass of 12.0 kg. What are the magnitudes of?
(a) Their acceleration in Figure a and