Energy And Work Done😵(Lower sec)

Energy And Work Done 😵 Types of Energy And the transfer of energy 🥵 1.ENERGY Denition Of Energy And Its Types Energy is defined as the capacity to do workSI Unit: Joules (J) There are Different types of energy stores (a way in which energy can bestored) Energy

Energy Transfers In Objects The Principle Of Conservation Of Energy states that❤Energy Cannot be created or destroyed❤Energy can be transferred from one store to another❤The total energy of an isolated system is constant (Note: nonet external force) WithoutAirResistance vs WithAirResistance No Thermal energy created Themal energy is created

2.WORK DONE Denition Of Work Done And Its Formula Work done is the product of the force and the distance moved in theerection of the force. Work is only done when:1. Is there a force acting on the object by another object2. Does the object move?3. Is the movement of object in the direction of the force FormulaW= F✕ dWork done(Joules,J)= Force(Newtons,N)✕ distance(metres,m)Answers must be in 2 or 3 s.f.!

Work done against Gravity Note: Must use the vertical distance!!! Therefore,1.Work done against push force: Use push force2.Work done against friction: Use frictional force3.Work done against gravity: use vertical distance with weight

3. Why S.I. Units are the same for Energy and Work Done? When work is done on an object, energy is transferred. This maychange the energy of the object Model Answer:Work os done on(the object) by the (type of force,if by another object,state that it is exerted by(the other object))Which (increases/decreases) its (type of energy related to the force)