Physics Chapter 1 – Energy – dissipation, elastic, gravitational and kinetic State the 9 energy stores. Define kinetic energy. Define elastic potential energy. State how to convert g to kg. State how to convert cm to m. State how to convert km to m. Sate the equation for kinetic with units. Sate the equation for elastic potential energy with units. State how to convert minutes into seconds. State how to convert hours into seconds. Define gravitational potential energy. Describe how we can increase the kinetic energy store of a moving object. Describe how we can increase the amount of elastic potential energy stored in a spring. Sate the equation for gravitational energy with units. Calculate the kinetic energy of a moving lorry which is travelling at a steady speed of 90m/s and has a mass of 250g. Show your working out. Calculate the gravitational potential energy when a ball is dropped from 1.5m with a mass of 0.5g on Earth (9.8N/kg). Show your working out. Calculate the elastic potential energy when a spring is stretched 10cm with a spring constant of 150N/m. Sow your working out. Describe the energy changes that occur when a ball is thrown up into the air and then caught again at the bottom.

Physics Chapter 1 – Energy – power, work done and maths skills Define work done. Define power. How much power is needed to power a kettle boiling water in 60swith a power of 12W. Show your working out. Describe the difference between a histogram and a bar chart. Write the equation for work done., include the units. Write the 2 equations for power, include the units. 1W = ____ J/s. Rearrange the kinetic energy equation to have m as the focus. How much power is needed to power a lawn motor in 1 hour which uses 109750 J or energy. Show your working out. More work is done when: Rearrange the kinetic energy equation to have v as the focus. Calculate the work done climbing up a flight of stairs to a total distance of 10m. Bob weighs 750N. Show your working out. Write these numbers to two significant figures: 1120 6082 111 9.899 10.5 525 711 6.43 The figures below show an example of a histogram and a bar chart. Histograms are used to show distributions of variables while bar charts are used to compare variables. Histograms plot quantitative data with ranges of the data grouped into bins or intervals while bar charts plot categorical data Describe how friction affects work done. Define mean. Define median Define mode

Physics Chapter 1 – Energy – dissipation, efficiency, resources and global supplies Describe what energy dissipation means. State the law of conservation of energy. Give some advantages and disadvantages for using nuclear energy. State the 2 energy efficiency calculations. Describe 2 ways we can used to reduce the transfer of energy. Define the terms and give examples of: Non-renewable energy Renewable energy For every 90J of energy supplied to a motor only 48J of energy is useful. Calculate the efficiency. Show your working out. Give some advantages and disadvantages for using solar energy. Give some advantages and disadvantages for using biofuel energy. Describe how to reduce the thermal energy loss from the diagram. Give some advantages and disadvantages for using wind energy. What factors do governments have to consider when deciding what energy resource to use?

Physics Chapter 1 – Energy – Specific heat capacity and RP Define specific heat capacity. Describe a method used to investigate the specific heat capacity of different metals when they are heated for 10 minutes. Write a risk assessment for this practical. Include the risk, hazard and the control. Write the equation, including units, for specific heat capacity. Draw and label a diagram showing the equipment set up. Rearrange the equation to have c as the focus. Calculate the energy change when the mass of water is 2kg and is heated from 20oC to 100oC. Water has a specific heat capacity of 4200J/kgoC. Show your working out. Independent variable – Dependent variable – Control variables -