Physics 1001 Notes

# The circle 4 physics 1001 notes chapter 6 work and

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Unformatted text preview: h speed ƒ=Dv2 The terminal speed is reached once the resisting force is equal to the weight force, leading to zero acceleration • Heavy objects fall faster in the air then lighter objects Circular Motion • When a particle moves in a circular path with a constant speed, the particles acceleration is always directed toward the centre of the circle (perpendicular to the instantaneous velocity) and is constant o arad = v2/R (uniform circular motion) o arad=4π2R/T2 o Uniform circular motion is a result of newtons second law, thus the net force must always be directed toward the centre, if the inward force stops acting the particle flies of in a straight line tangent to the circle 4 Physics 1001 Notes Chapter 6: Work and Kinetic Energy Work • • • W=Fs (constant force in direction of straight- line displacement) The SI unit of work is the joule which is 1 Newton- meter W=Fscosø or W=F · S o Work is a scalar quantity Kinetic Energy and the Work- Energy Theorem • • K=1/2 · m · v2 The work done by the net force on a particle equals the change in the particles...
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## This note was uploaded on 04/09/2014 for the course PHYS 1001 taught by Professor Helenjohnston during the Three '13 term at University of Sydney.

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