Mechanics

Mechanics

Project Type: Presentation (pptx)

Downloads: 10 - 50 Saturday 18th March 2017 Report

Mechanics - Overview

------------ PAGE 1 ------------ Mechanics Submitted By Group – ALPHA Daffodil International University Group- T ------------ PAGE 2 ------------ Shahriare tasJid Id: 171- 15- 9384 ------------ PAGE 3 ------------ Mechanics „« The Study of Physics begins with Mechanics. „« Mechanics is a branch of science which deals with the motion of and forces on objects. „« Sometimes referred to as classical mechanics or Newtonian mechanics. „« Is concerned with the effects of forces on material objects „« Today, mechanics is of vital importance to students from all disciplines „« A major development in the theory of Mechanics was provided by Isaac Newton in 1687. ------------ PAGE 4 ------------ Types Of Mechanics ------------ PAGE 5 ------------ Definition Of Statics and Dynamics „« What is Statics? „« Statics is the branch of mechanics that deals with the study of objects at rest. Objects at rest may or may not be under the influence of forces. „« What is dynamics? „« Dynamics is the branch of mechanics that deals with the study of objects in motion and the forces causing such motion. ------------ PAGE 6 ------------ Types Of Dynamics ------------ PAGE 7 ------------ Definition Of Kinematics and Kinetics „« What is Kinematics? „« Kinematics is the study of the motion of bodies without consideration of the cause of the motion. Some examples of kinematic concepts are displacement, velocity and acceleration. „« What is kinetics? „« Kinetics is the branch of mechanics which deals with the study of the motion of bodies by considering the cause of motion. ------------ PAGE 8 ------------ Md Imran Sarder ID: 171- 15- 9382 ------------ PAGE 9 ------------ Torque ------------ PAGE 10 ------------ Torque „X What is Torque? „X The part of the linear force responsible for the rotation of an object about an axis is called torque. ------------ PAGE 11 ------------ Example ------------ PAGE 12 ------------ Mathematical Definition ƒå Torque can be measured by the product of the linear force and perpendicular distance of the direction of the force from the Centre of rotation ------------ PAGE 13 ------------ Opening a Door with Maximum Torque ------------ PAGE 14 ------------ Equation Of Torque ------------ PAGE 15 ------------ ƒå Abir Hossain khan ƒå ƒå ID: 171- 15- 9358 ------------ PAGE 16 ------------ Velocity „« Velocity is a description of an object's speed and direction. „« It is a Vector. „« Velocity= displacement/ time taken „« Two objects travelling with the same speed but in different directions have different velocities. „« Since velocity has both magnitude and direction. It is a vector quantity ------------ PAGE 17 ------------ Equation of Velocity ƒå Average velocity can be defined as the displacement divided by the time . For the special case of straight line motion in the X direction, the average velocity takes the form. ------------ PAGE 18 ------------ Khorshed Ahmed ID: 171- 15- 9341 ------------ PAGE 19 ------------ Force What is Force? „« A push or pull „« Force has a size and direction „« All motion is created by force „« All forces are exerted by one object on another. ------------ PAGE 20 ------------ How is Force Measured? „« Measured in Newton's ( N) „« The more Newton's, the greater the force. „« One tool to measure the force of gravity is the spring scale ------------ PAGE 21 ------------ Formula of Force ƒå In general, the formula for force is given by ƒå Where, m = mass a = acceleration. It is expressed in Newton ( N) or Kgm/ s 2 . Equation - ƒå ------------ PAGE 22 ------------ Team – ALPHA Member Shahriare tasJid ( 171- 15- 9384) Foysal Ahmed ( 171- 15- 9375) Imran Sarder ( 171- 15- 9382) Abir Hossain Khan( 171- 15- 9358) Khorshed Ahmed ( 171- 15- 9341) ------------ PAGE 23 ------------ 9341)
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