Αποτελέσματα Αναζήτησης
Work-Energy Theorem: (a special case of the law of conservation of energy) The change in kinetic energy of a system equals the sum of work done by all the individual forces on the system: ∆K = ∑W Strictly speaking this theorem applies to rigid ("non-squishy") objects KJF §10.3
The body losing energy does work, the body gaining energy has work done on it. Work is given by the force multiplied by the displacement through which the force acts, or: Work = Change in Energy = Force × displacement. WW = ∆E = F × d. where F = force (N), d = displacement (m) Note: Work is a scalar quantity. The unit of work is the Joule (J)
This video explains the work energy theorem and discusses how work done on an object increases the object’s KE.
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, Energy and Power formulae www.vaxasoftware.com Work of a constant force (Force is parallel to displacement) (Work of force of friction) W F x cos W F x W FFRIC x Kinetic energy 2 2 1 EK mv Gravitational potential energy (Near a planet surface) EP m g h Gravitational potential energy r M m EP G Elastic potential energy 2 2 1 EP k x
Work is done on a gas to change its volume when it is at constant pressure, (this is usually done through the transfer of thermal energy) the value of work done can be calculated using the formula: W ork done = pΔV. Where p is the pressure and Δ V is the change in volume. Efficiency is a measure of how efficiently a system transfers energy.
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.
