What you’ll learn4 learning objectivesChoose one objective for a focused lesson, or study the complete topic.4.4.1Forces• apply Newton's laws of motion to the linear motion of a particle of constant mass moving under the action of constant forces, which may include friction, tension in an inextensible string and thrust in a connecting rod If any other forces resisting motion are to be considered (e.g. air resistance) this will be indicated in the question.Syllabus objective4.4.2Mass and weight• use the relationship between mass and weight W = mg. In this component, questions are mainly numerical, and use of the approximate numerical value 10 (m s-2) for g is expected.Syllabus objective4.4.3Constant acceleration• solve simple problems which may be modelled as the motion of a particle moving vertically or on an inclined plane with constant acceleration Including, for example, motion of a particle on a rough plane where the acceleration while moving up the plane is different from the acceleration while moving down the plane.Syllabus objective4.4.4Connected-particle models• solve simple problems which may be modelled as the motion of connected particles. e.g. particles connected by a light inextensible string passing over a smooth pulley, or a car towing a trailer by means of either a light rope or a light rigid tow-bar.Syllabus objective