Physics 1001 Notes

# Energy is also conserved such a collision is called

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Unformatted text preview: conversions between kinetic and potential energy’s Conservative forces have four main properties o It can be expressed as the difference between the initial an final values of a potential energy function o It is reversible o It is independent of the path of the body o When starting and ending points are the same total work is zero A non- conservative force cannot be represented by potential- energy functions- usually a dissipative force Law of conservation of energy o ΔK = ΔU + ΔU int = 0 o Energy is never created or destroyed it only changes form 8 Physics 1001 Notes Momentum, Impulse and Collisions Momentum • Definition of momentum → → o p = m v o Momentum is a vector quantity and has the units kg༉m/s → → o • ∑F = Impulse is defined as the product of the net force and the time interval o Impulse defines an average force → o • dp dt → j = ∑ FΔt o Impulse is a vector quantity and is in the same direction as the net force o The Si unit is N༉s Impulse momentum theorem → o o → → j = p 2 − p1 ∫ t2 t1 Fnet dt (General definition of impulse) o The change in momentum equals the impulse o If...
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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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