17 Januari 2018

Newton's Laws

Newton’s First Law of Motion

Newton said that any object in motion will stay in motion and that any object at rest will stay at rest unless acted on by an outside force.  This is generally known as the "Law of Inertia" and inertia was originally a theory that Galileo found. Inertia- an object's tendency to resist a change in motion.

Newton’s Second Law

Newton’s second law answers the question of what happens to an object that has one or more forces acting on it.

Newton's First Law deals with an object with no net force. Newton's Second Law talks about an object that has net force. It states that when the net force acting on an object is not zero, the object will accelerate at the direction of the exerted force. In other words, force and acceleration are directly proportional, while mass and acceleration are inversely proportional.

Newton’s Third Law of Motion

If you press against a corner of this textbook with your fingertip, the book pushes back and makes a small dent in your skin. If you push harder, the book does the same and the dent in your skin is a little larger. This simple activity illustrates that forces are interactions between two objects : when your finger pushes on the book, the book pushes back on your finger. The important principle is known as Newton’s third law.

We continues with problem solving activities by answering past year questions.
Calculate the resultant force using resolution method.
Calculate force, mass, acceleration using F = ma 

JUNE 2014 past year questions