QUESTION 5 5.1 A 5 kg mass and a 20 kg mass are connected by a light inextensible string which passes over a light frictionless pulley. Initially, the 5 kg mass is held stationary on a horizontal surface, while the 20 kg mess hangs vertically downwards, 6 m above the ground, as shown in the diagram, not drawn to scale. When the stationary 5 kg mass is released, the two masses begin to move. The coefficient of kinetic friction, px, between the S kg mass and the horizontal surface is 0,4. Ignore the effects of air friction.
5.1.1 Calculate the acceleration of the 20 kg mass. (5) 6kg ​