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Unformatted text preview: FOSEE , MULTIMEDIA UNIVERSITY (436821T) MELAKA CAMPUS, JALAN AYER KEROH LAMA, 75450 MELAKA, MALAYSIA. Tel 606 252 3594 Fax 606 231 8799 URL: http://fosee.mmu.edu.my/~asd/ PPH0075 Physics 1 Foundation in Engineering ONLINE NOTES Lecture Notes Chapter 3: Dynamics Applied Science Department (ASD) Centre for Foundation Studies and Extension Education (FOSEE) FOSEE , MULTIMEDIA UNIVERSITY (436821T) MELAKA CAMPUS, JALAN AYER KEROH LAMA, 75450 MELAKA, MALAYSIA. Tel 606 252 3594 Fax 606 231 8799 URL: http://fosee.mmu.edu.my/~asd/ Dynamics NEWTON’S LAWS OF MOTIONS. • 1 st Law : If & F =0 , • then v = constant or a = 0 • 2 nd Law: & F = m a • 3 rd Law: F 12 =  F 21 RICTION FORCE • Static friction force ( f s ≤ μ s N ) • Kinetic friction force ( f k = μ k N ) LINEAR MOMENTUM AND COLLISIONS • The linear momentum of a particle is a vector p p = m v ………..(1) m : mass v : velovity • The rate of change of the momentum of particle is equal to the net force applied to it & Δ Δ = t p F • The total momentum of an isolated system of bodies remains constant & x F = 0 EXPLOSION • 2 2 1 1 = + f f v m v m • Energy Conservation : an explosion is possible as long as there is an initial potential as long as there is an initial potential energy ie 2 2 2 2 1 1 2 1 2 1 f f v m v m PE + = IMPULSE AND IMPULSIVE FORCE • Impulse = F Δ t • Impulse = change in momentum o F Δ t = m ( v f v i ) APPARENT WEIGHT / WEIGHTLESSNESS. • When the acceleration of the person and the enclosure are equal, the person is apparently weightless , even ough the (true W = mg) PPH0075 Physics 1 Chapter 3 ______________________________________________________________________________________ ASD2008/09 1/ 20 3.0 DYNAMICS UPON COMPLETION OF THIS CHAPTER, YOU SHOULD BE ABLE TO: 1. Relate force and motion and explain what is meant by a net or unbalanced force. 2. State and explain Newton’s first law of motion, and describe inertia and its relationship to mass. 3. State and explain Newton’s second law of motion and apply it to physical situations. 4. Apply Newton’s second law, including the component form, to various situations. 5. State and explain Newton’s third law of motion and identify actionreaction pairs. 6. Compute linear momentum. 7. Explain the condition for the conservation of linear momentum and apply it to physical situations. 8. Relate impulse and momentum, and kinetic energy and momentum....
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 Spring '09
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 Force, Friction

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