a. Outline four causes of formwork failure. b. Describe each of the following types of drainage systems: i. Separate system ii. Combined system iii. Partially separate system. C-i. Explain two main functions of paint.

1. a) Force is a push or a pull that can change the motion of an object or its shape. Two types of force: Muscular force and Gravitational force. b) i) Muscular force: Force applied by the action of muscles. Example: Pushing a door or lifting a book. ii) Gravitational force: The force that pulls objects towards the Earth. Example: A ball falling to the ground. 2. Magnetic force: The force by which magnets attract or repel other magnets or magnetic materials. c) Magnetic force acts at a distance because a magnet produces an invisible magnetic field around it. Any magnetic object in this field experiences the force without the magnet touching it. Example: Iron pins are attracted to a magnet from a distance.