Mechanical Technology Grade 12 IEB 2019 Information Sheet

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE: MECHANICAL TECHNOLOGY – FORMULA SHEET Page 1 of 1 FORMULA SHEET 1. STRESS AND STRAIN Force F 1.1 Stress = or σ= Area A Stress σ 1.2 Young's modulus = or E= ε Strain Change in length ∆𝑙𝑙 1.3 Strain = or 𝜀𝜀 = 𝑜𝑜𝑜𝑜 Original length π D2 1.4 A shaft = 4 1.5 A pipe = ( p D2 − d2 ) 4 2. PYTHAGORAS THEOREM AND TRIGONOMETRY r y ϴ x y 2.1 sin θ = r x 2.2 cos θ = r y 2.3 tan θ = x 2.4 r 2 = x2 + y2 or a2 = b2 + c2 3. TEMPLATES AND DEVELOPMENTS 3.1 Mean ø = Outside ø – Plate thickness or Mean ø = Inside ø + Plate thickness 3.2 Mean circumference = π × Mean ø IEB Copyright © 2019