Mehran University of Mehran University of Engineering & TechnologyEngineering & Technology

Presentation Of:-Presentation Of:- Force,Work, Energy & Power Force,Work, Energy & Power

Presented By:Presented By: Ghulam Mustafa GhoriGhulam Mustafa Ghori Roll# 13TE89Roll# 13TE89

Content:Content:

1)1) ForceForce2)2) WorkWork3)3) EnergyEnergy4)4) PowerPower5)5) Their Application’s in Textile Their Application’s in Textile

EngineeringEngineering

Force:-Force:-

� A phenomenon which produces, or tends to produce, motion or change of motion in body called Force.

� F=ma S.I Unit: Newton

WorkWork� The product of force and the amount of

displacement along the line of action of that force, figure 1.1 shows work

Units: ft . lbs (horsepower) Newton meter (Joule)

ntdisplacemeForceWork ×=

Figure 1.1

Work = F x dWork = F x dTo calculate work done on an object, we

need:The Force� The average magnitude of the force � The direction of the forceThe Displacement� The magnitude of the change of position� The direction of the change of position

+ve & -ve Work+ve & -ve Work� Positive work is performed when

the direction of the force and the direction of motion are the same

Example:� Throwing a ball

+ve & -ve Work+ve & -ve Work� Negative work is performed

when the direction of the force and the direction of motion are the opposite

e.g: Catching

EnergyEnergy� Energy (E) is defined as the capacity to do

work (scalar)� Many forms

� No more created, only converted� chemical, sound, heat, nuclear, mechanical

� Kinetic Energy (KE):� energy due to motion

� Potential Energy (PE):� energy due to position or deformation

Kinetic EnergyKinetic EnergyKinetic Energy of an object is the energy

which it possesses due to it’d motion. S.I unit is Joule

Formula:-

KE = 1/2 mv2

Potential EnergyPotential EnergyGravitational PE:

� Energy due to an object’s position relative to the earth.

S.I unit is JouleFormula: P.E=mgh S.I unit Joule

Figure 1.2

Work - Energy RelationshipWork - Energy Relationship

� The work done by an external force acting on an object causes a change in the mechanical energy of the object

( ) )(2

1 2ifif rrmgvvmFd

PEKEFd

EnergyFd

−+−=

∆+∆=∆=

PowerPower� The rate of doing work

� Work = Fd

Units: Fd/s = J/s = watt

velocityForcePower

tFdPower

timeWorkPower

∗===

/

/

� Energy is required to run the Machine, like we have draw frame, to run the machine energy is required then machine will run, and generate power and will transmit power with the help of gear or belt drive system

� And Machine will work, it will do equalizing, parallelization, dust removal and form sliver

Draw frame

� Power Transmission