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The Work-Energy Theorem. 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-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 and Energy. This video explains the work energy theorem and discusses how work done on an object increases the object’s KE.
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
Kinetic Energy and the Work-Energy Theorem. Explain work as a transfer of energy and net work as the work done by the net force. Explain and apply the work-energy theorem. 7.3. Gravitational Potential Energy. Explain gravitational potential energy in terms of work done against gravity.
3. Work-energy theorem The work done in the displacement by the force is defined as B A W(A B) F dr (1) where the limits A and B stand for the positions rA and rB. The substitution of the force F defined by dt d m v F into Eq.(1) leads to B A d dt d W A B m r v . Now dt dt dt d d v r r so that B A dt dt d W A B m v v
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.
