(speed is at a maximum when x=0)
Simple harmonic motion along a straight line can be represented by the projection of
uniform circular motion along a diameter of a reference circle
Simple Harmonic Motion is the 1-D Projection of uniform circular motion
o Hookes Law: the force required to stretch or compress a spring is proportional to
the amount of stretch or compression x
o K is a measure of the stiffness of the spring (the larger the stiffer)
o Force exerted by the spring is always directed opposite t
Mass: property of an object that specifies how much resistance an object exhibits to changes
in its velocity(kg); a measure of an objects inertia (Newton); the greater the mass of an
object, the less the object accelerates under the action of a given app
& (Recall Frankie D)
The centre of mass of any symmetric object lies on an axis on symmetry and on any plane of
symmetry
The total linear momentum of the system equals the total mass multiplied by the velocity of
the centre of mass
o The
Chapter 10 Rol
Physics 1D03 Notes for the Term Lecture and Textbook
Chapter 2
Kinematics: description of motion
One Dimensional: along a straight line
Scalars: real numbers with units
Instantaneous Velocity: cannot be measured, slope of the tangent, average over infinit
total momentum doesnt change, only internal forces act
o Brief interaction between two or more objects
o Objects exert equal and opposite forces on each other
o Assume internal forces are much longer than external
o Can ignore external forces if we compa
Tangential and Radial Acceleration: velocity changes both in direction and in magnitude
o The tangential acceleration component causes a change in the speed of the particle
(parallel to the instantaneous velocity)
o The radial acceleration component aris
Replacing the real gravitational forces by a single force, equal to the total weight, and placed
at the centre of gravity will not change the total gravitational torque
o The external forces needed to hold a rigid body in equilibrium can be calculated
as
Thermal Energy (just kinetic and potential energy at a microscopic scale)
Matter transfer involves situations in which matter physically crosses the boundary of a system
If the total amount of energy in a system changes, it can only be because energy h
An object moving through a liquid or gas experiences a speed-dependant resistive force. This
resistive force is in a direction opposite that of the velocity of the object relative to the medium
and generally increases with speed. The magnitude of the res
(speed is at a maximum when x=0)
Simple harmonic motion along a straight line can be represented by the projection of
uniform circular motion along a diameter of a reference circle
Simple Harmonic Motion is the 1-D Projection of uniform circular motion