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Document Title
Fundamentals of Stress and Vibration 2. Engineering Mechanics Chapter
[A Practical guide for aspiring Designers / Analysts]

”ƒ’Š‹ ƒŽŽ›ǡ ‹‡–‹ ‡‡”‰› ‘—Ž† „‡ ”‡’”‡•‡–‡† ƒ• ˆ‘ŽŽ‘™•ǣ

[Fig 2.3: work done by a force (F) over a displacement (s)]

”ƒ˜‹–ƒ–‹‘ƒŽ ‘–‡–‹ƒŽ ‡”‰›ǣ –Š‹• ‹• ‰‹˜‡ „› –Š‡ ’”‘†— – ‘ˆ ‰”ƒ˜‹–ƒ–‹‘ƒŽ ’—ŽŽ ƒ†
†‹•’Žƒ ‡‡–Ǥ Š‹• ‹• ƒ–Š‡ƒ–‹ ƒŽŽ› ”‡’”‡•‡–‡† ƒ• ˆ‘ŽŽ‘™•ǣ

work done = force ∗ displacement = F ∗ s = mg ∗ s

[Fig 2.4: work done against gravity/self weight]

‘‹– –‘ ’‘†‡”ǣ ™Š‡ ƒ ‘„Œ‡ – ‹• Ž‹ˆ–‡†ǡ –Š‡ ˆ‘” ‡ ƒ’’Ž‹‡† ‹ Ž‹ˆ–‹‰ –Š‡ ‘„Œ‡ – Šƒ• –‘ „‡
‰”‡ƒ–‡” –Šƒ –Š‡ ™‡‹‰Š– ‘ˆ –Š‡ ‘„Œ‡ –ǡ ‡ƒ‹‰ǡ –Š‡ ‘„Œ‡ – ‹• ƒ ‡Ž‡”ƒ–‹‰Ǥ ‘™‡˜‡”ǡ –Š‡ ‘„Œ‡ – ‹•
‰‘‹‰ –‘ •–‘’ ƒ– ƒ ‡”–ƒ‹ Š‡‹‰Š–ǡ ‡ƒ‹‰ǡ –Š‡ ‘„Œ‡ – ‹• †‡ ‡Ž‡”ƒ–‡† ȋŠ‡”‡ǡ –Š‡ ˆ‘” ‡ ‡š‡”–‡† ‹• Ž‡••
–Šƒ –Š‡ ™‡‹‰Š–ȌǤ Š‡”‡ˆ‘”‡ǡ –Š‡ ˆ‘” ‡ ƒ’’Ž‹‡† ‹• ‘”‡ –Šƒ –Š‡ •‡Žˆ™‡‹‰Š– ‘ˆ –Š‡ ‘„Œ‡ – ˆ‘” ‘‡ ŠƒŽˆ
‘ˆ –Š‡ ‘–‹‘ ƒ† Ž‡•• –Šƒ –Š‡ •‡Žˆ™‡‹‰Š– ˆ‘” –Š‡ •‡ ‘† ŠƒŽˆ ‘ˆ –Š‡ ‘–‹‘Ǥ Š‡ ƒ˜‡”ƒ‰‡ ˆ‘” ‡
‡š‡”–‡†ǡ ‹• –Š‡ •‡Žˆ™‡‹‰Š– ‹–•‡ŽˆǤ

QP No. SSC/Q4401, Version 1.0, NSQF Level 7, Compliant with Aero and Auto Industries, P
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