Work Done and Energy

• Work done = force × distance
• Force = work done / distance
• Distance = work done / force
• Work is measured in joules (J).
• Force is measured in newton's (N).
• Distance is measured in metres (m).
• Work done is the amount of energy transferred.
• "Work done by an object is always equal to the energy transferred or by the object."
• Kinetic energy (KE) is the energy of a moving object.
• Kinetic Energy = ½ × mass × velocity²
• (Gravitational) potential energy (PE) is the energy an object has because of its position (usually its height above ground, or some other reference point).
• Change in potential energy = mass × gravitational field strength × change in height
• PE = m × g × h
• Potential energy is measured in joules (J).
• Mass is measured in kilograms (kg).
• Gravitational field strength is measured in N/kg (or m/s²).
• Height is measured in metres (m).
• The law of conservation of energy states that energy can't be created or destroyed, only transferred from one form to another.