MOTION: Types Of Motion J S 3 E-Note 3rd Term

Week 2. Motion

OUTLINE

By the end of the lesson the students should be able to

Definition of motion
Distinguish between the different types of motion
State newtons law of motion
Deduce the equation of motion

DEFINITION OF MOTION

Motion is the change in position of an object with respect to time. It involves the displacement of an object from one point in space to another.

DIFFERENT TYPES OF MOTION

Motion can be classified into various types

Translational Motion

When an object moves in a straight line or along a curved path, its motion is called translational motion.

Rotational Motion

When an object rotates or spins about a fixed axis, its motion is called rotational motion.

Oscillatory Motion

When an object moves back and forth around a central point, it undergoes oscillatory motion.

Circular Motion

When an object moves in a circular path around a central point, its motion is called circular motion.

NEWTON’S LAWS OF MOTION:

Newton’s First Law (Law of Inertia):

An object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.

Newton’s Second Law (Law of Acceleration):

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Newton’s Third Law (Action-Reaction Law):

For every action, there is an equal and opposite reaction.

EQUATION OF MOTION

The equation of motion relates an object’s displacement, velocity, acceleration, and time. It’s often expressed as:

s=ut+1/2 at”2 (for motion under constant acceleration)
v= u +at (relating final velocity, initial velocity, acceleration, and time)
v*2+ u*2+ 2as (relating final velocity, initial velocity, acceleration, and displacement)

Where:

s = displacement

u = initial velocity

v = final velocity

a = acceleration

t = time.

Week 1. ENERGY J S 3 E-Note