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The principle of work and kinetic energy (also known as the work-energy theorem) states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle.
Work (W) is equal to the amount of energy transferred or converted by the force. Work is a scalar. S.I. unit is also the joule (J). where F is applied force, s is object's displacement while the force is applied and θ is angle between applied force and displacement.
work-energy (WE) theorem : The change in kinetic energy of a particle is equal to the work done on it by the net force. We shall generalise the above derivation to a varying force in a later section. Example 6.2It is well known that a raindrop falls under the influence of the downward gravitational force and the opposing resistive force. The ...
Work-energy theorem: The net/total work done on an object is equal to the change in the object’s kinetic energy. In symbols: Wnet = ∆ EK. 2 Wnet = 2m(vf. - vi 2) Conservative force: The work done by the force in moving an object between 2 points is independent of the path taken ex. gravitational, electrostatic and elastic forces.
Work-Kinetic Energy Theorem: The work done by the net force on a single point-like object is equal to the change in kinetic energy of that object. W W KE KE KE net Fnet f i Notice that this is the work done by the total force, the net force. The Work-KE Theorem
work–kinetic energy theorem says W = Wcons +Wnon−cons = ∆K But from Eq. 6.18, the work done by conservative forces can be written as a change in potential energy as: Wcons = −∆U where U is the sum of all types of potential energy. With this replacement, we find: −∆U +Wnon−cons = ∆K
Work and Energy. This video explains the work energy theorem and discusses how work done on an object increases the object’s KE.
