# Chapter 04 Week 03-The Laws Of Motion.pdf - Foundation...

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Norjuliyati Binti Hamzah Foundation Physic 1 (PHY094) Chapter 4 The Laws of Motion
Units of Chapter 4 4.1 Force 4.2 Newton’s First Law4.3 Newton’s Second Law4.4 Newton’s Third Law4.5 Application of Newton’s Law4.6 Force of Friction pg 88
At the end of the lesson, the students should be able to: State the Newton’s First, Second and Third LawApply Newton’s First and Second Law for statics problems Apply Newton’s Second Law for dynamic problems Draw and label the free body diagrams Determine the normal force of an object on a horizontal or inclined surface which may or may not under the action of an external force
At the end of the lesson, the students should be able to: Differentiate between the and Determine tension in a stress-up string due to suspended object or taut in the string Determine the acceleration of an connected objects in horizontal or vertical motion or a combination of both Identify forces such as tension, friction, weight and reaction that enable a body to perform circular motion on horizontal and vertical planes kfsf
4-1 Forces pg 89
May be a contact force or a field force Contact forces result from physical contact between two objects Field forces act between disconnected objects 4-1 Forces Contact Forces: Pull spring Pull wagon Kick football pg 89
4-1 Forces Field Forces: Force gravitational Electric force Force exerted by bar magnet pg 89
Newton’s First Law: An object at rest remains at rest as long as no net force acts on it. An object moving with constant velocity continues to move with the same speed and in the same direction as long as no net force acts on it. The net force is defined as the vector sum of all the external forces exerted on the object This Newton’s first law is often called the law of inertia. . 4-2 Newton’s First Lawpg 90
4-2 Newton’s First Law
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4-2 Newton’s First Law
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External Force: Any force that results from the interaction between the object and its environment Internal Force: Forces that originate within the object itself They cannot change the object’s velocity 4-2 Newton’s First Lawpg 91
Mass: A measure of the resistance of an object to changes in its motion due to a force The larger the mass, the less it accelerates under the action of a given force SI unit: kilogram (kg) Scalar quantity Inertia: Is the tendency of an object to continue in its original state of motion In the absence of a force 4-2 Newton’s First Lawpg 91