Energy and power and force

• Their are different types of energy

  Kinetic energy

  Gravitational energy

  Chemical energy

  Thermal energy
• Energy is measured in joules or kilojoules
• Power is measured in Watts
• Force is measured in newton's (N)
• Work done = Force x distance moved
• Speed = Distance travelled / Time taken to travel the distance
• Acceleration = Change in velocity / change in time
• Newtons first law states that an object at rest will stay at rest unless acted upon by an unbalanced force.
• Impulse = Force x time
• Momentum = Mass x Velocity
• Energy transfer occurs when energy moves from one place or object to another.
• The law of conservation of energy states that energy cannot be created nor destroyed, only transferred between objects.
• Distance is measured in metres (m)
• Kinetic energy = mass x speed^2
• Kinetic energy is the energy stored within moving objects due to their motion.
• Potential energy is stored energy, such as chemical potential energy (food) or gravitational potential energy (height).
• Elastic potential energy is the energy stored within stretched or compressed springs.
• Speed is measured in m/s
• Acceleration is the change in velocity over time
• Potential energy = height x weight
• Force = mass x acceleration
• Gravitational potential energy is the energy stored by an object as it falls under gravity.
• Chemical potential energy is the energy stored in food, fuels, and other chemicals.
• Electrical potential energy is the energy stored within charged particles.