A block on a table has a mass of 10 kg. A force of 20N is exerted on the side of the block. The friction force between the block and the table is 5 N. Find the blocks acceleration.
F=ma First of all.
If 20 N are applied to the block 5 N are 'used' to overcome friction for a 'net' force of 15N applied to the block
15 N = 10 kg x a
15 kg m/sec^2 = 10 kg x a
15/10 = a = 1 1/3 m/sec^2