AQA GCSE Physics Paper 1:Topic 1- Energy

• What is the equation linking kinetic energy, mass and velocity?
• Kinetic Energy = 1/2 x Mass x Velocity^2
• What are the disadvantages of waves? (energy)

  -disturb the seabed and habitats of marine animals-unreliable -initial costs are high-can't provide energy on a large scale
• When energy is transferred to an object where is the energy stored?

  In one of the objects energy stores
• What are the energy stores?

  -kinetic-thermal-chemical-gravitational potential -elastic potential-electrostatic-magnetic-nuclear
• What objects have a kinetic energy store?

  Anything moving has energy in its kinetic energy store
• What objects have a thermal energy store?

  Any object- the hotter it is, the more energy it has in this store
• What are thermal energy stores also known as?

  Internal energy stores
• What objects have a chemical energy store?

  Anything that can release energy by a chemical reaction
• What are examples of objects with a chemical energy store?

  -food-fuels
• What objects have a gravitational potential energy store?


  Anything that has mass and is inside a gravitational field
• What objects have a elastic potential energy store?

  Anything that is stretched (or compressed)
• What is an example of an object with a elastic potential energy store?

  Springs
• What objects have a electrostatic energy store?

  Anything with electric charge that is interacting with another electric charge
• What objects have a magnetic energy store?

  Anything magnetic that is interacting with another magnet
• What objects have a nuclear energy store?

  Atomic nuclei have energy in this store that can be released in nuclear reactions
• What is energy?

  Energy is what makes things happen. It can be transferred between stores and different things happen depending upon which stores it is moving between
• What is magnetic energy?

  Energy stored in two separated magnets that are attracting or repelling
• What is nuclear energy?

  Energy stored in the nucleus of an atom
• What is thermal energy?

  Energy stored in a warm object
• What is gravitational potential energy?


  Due to an object's position in a gravitational field
• What is kinetic energy?


  Energy stored in a moving object
• What is chemical energy?

  Energy stored in fuels and food
• What is electro static energy?

  Energy stored in two separated charges that are attracting or repelling
• What is elastic potential energy?

  Energy stored in a stretched or compressed object
• What are the 4 ways energy is transferred?

  MechanicallyElectricallyBy heatingBy radiation
• What is a system?


  A fancy word for a single object (e.g the air in a piston) or a group of objects (e.g two colliding vehicles) that you're interested in
• What is a closed system?

  Systems where neither matter nor energy can enter or leave. The net change in the total energy of a closed system is always zero.
• The more ........ energy that is transferred to a ..... energy store, the more ....... a machine is said to be.

  output, efficient, waste, input, usefulInputUsefulEfficient
• What must you do to make something more efficient?

  Reduce waste output energy
• Efficiency equation

  Efficiency=(useful energy transferred/energy supplied)x100 (EFFICIENCY IS ALWAYS LESS THAN 100%)
• What is a conductor?

  Transfers heat quickly
• What is the equation for kinetic energy (KE)?


  Kinetic energy= 1/2 mass x velocity^2(J) (kg) (m/s)KE=1/2m x v^2
• A van with a mass 2450kg is travelling at 40.0 m/s, calculate the energy in its kinetic energy store

  KE= 1/2m x v^2KE= 1/2x2450 x 40^2KE= 1960000 J
• What is the equation for GPE?

  GPE= mass x gravitational field strength x height(J) (kg) (N/kg) (m)GPE= m x g x h
• A 50 kg mass is raised through a height of 6.0m. Find the energy transferred to its GPE store(gravitational field strength=


  .81 N/kg)9GPE= m x g x hGPE= 50 x 9.81 x 6GPE= 2943 J
• What is energy lost from a gpe store equal to?

  Energy gained in the kinetic energy store
• How can you increase the elastic potential store of an object?

  -compress-stretch -twist
• What is the elastic potential energy equation (Ee)?

  Elastic potential energy= 1/2spring constante x extension^2(J) (N/m) (m)
• What are non-renewable energy resources?


  These are not being made at the same rate they are being used. They will be exhausted