[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-207896-en":3,"doc-seo-207896-105":29,"detail-sidebar-cat-0-en-105":89},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":4,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":11,"language":21,"language_code":22,"site_id":23,"html_lang":22,"table_of_contents":24,"faqs":25,"seo_title":26,"seo_description":14,"update_tm":27,"read_time":28},207896,24189269381491,"Bill Black","https://ap-avatar.wpscdn.com/avatar/160000cf11732dd8392?x-image-process=image/resize,m_fixed,w_180,h_180&k=1788146458752108895",4,"Exam","AQA Physics Unit 4.1 - Energy Foundation - Revision","AQA Physics Unit 4.1 focuses on core energy concepts, including defining systems and applying the law of conservation of energy. It explains how kinetic, elastic potential, gravitational potential, thermal, chemical and electric energy stores change during real-life situations. The unit covers key equations, required units, definitions such as specific heat capacity and dissipation, and power calculations. It also addresses efficiency, unwanted energy transfers and methods to reduce them, plus energy resources, renewable versus non-renewable classifications and environmental impacts.","AQA Physics Unit 4.1-Energy-Foundation  \na  \nDescribe what a system is.  \n| b\u003Cbr>Describe energy store changes for the following objects:\u003Cbr>|  |  |\n| --- | --- | --- |\n| | | |\n| A football that has been kicked upwards.\u003Cbr>As the ball moves upwards, the kinetic energy store of the ball   and the   store of the ball increases.\u003Cbr>A squash ball hitting a wall.\u003Cbr>When the ball hits the wall, the kinetic energy store of the ball   and the   store increases. Some of the energy is also transferred to the surroundings. The thermal energy store of the   increases and some of the energy is carried by sound waves.\u003Cbr>A car accelerating.\u003Cbr>As the car moves, the chemical energy store of the petrol   and the    of the car increases. Some of the energy is also transferred by   waves to the surroundings and the energy store of the surroundings also increases.\u003Cbr>A car decelerating.\u003Cbr>As the car slows down, the   energy store decreases and the    energy store of the surroundings and brakes   . Some of the energy is also transferred by   waves to the surroundings.\u003Cbr>Bringing water to the boil.\u003Cbr>The electric current transfers some of the   and the    energy store of the water increases, which increases the    energy stores of the particles that make up the water. |  |  |\n\n\n| What is the equation linking kinetic energy, mass and speed? | c\u003Cbr>|\n| --- | --- |\n| Write the units for the following:\u003Cbr>kinetic energy:  \u003Cbr>mass:  \u003Cbr>speed:  \u003Cbr>A toy car moving down a ramp has a kinetic energy store. Give two more examples of objects with kinetic energy stores. |  |\n\nd  \nWhat is the equation linking elastic potential energy, spring constant and extension?  \nWrite the units for the following:  \nelastic potential energy:    \nspring constant:    \nextension:    \nA tennis ball that has been squashed has an elastic potential energy store. Give two more examples of objects with elastic potential energy stores.  \n\n| What is the equation linking gravitational potential energy, mass, gravitational field strength and height? | e\u003Cbr>|\n| --- | --- |\n| Write the units for the following:\u003Cbr>gravitational potential energy:  \u003Cbr>mass:  \u003Cbr>gravitational field strength:  \u003Cbr>height:  \u003Cbr>An apple on a tree is an example of an object that has a gravitational potential energy store. Give two more examples. |  |\n\n1  \nf  \nWhat is the equation linking change in thermal energy, mass, specific heat capacity and temperature change?  \nWrite the units for the following:  \nchange in thermal energy:   specific heat capacity:    \nWrite a definition for specific heat capacity.  \n\n|  |\n| --- |\n|  |\n\nPower is: g  \nthe rate at which   and the rate at which    \nWhat is the equation linking power, energy transferred and time?  \n| What is the equation linking power, work done and time? |\n| --- |\n| Write the units for the following:\u003Cbr>power:  \u003Cbr>energy transferred:  \u003Cbr>time:  \u003Cbr>work done:  \u003Cbr>The power output of a hairdryer is 2000W. How much energy is transferred per\u003Cbr>second? |\n| An LED bulb has a power rating of 8W, a halogen bulb has a power rating of 28W but they both have a similar brightness. What is the difference? |\n\nAQA Physics Unit 4.1-Energy-Foundation  \na  \nWhat is the law of conservation of energy?  \nEnergy cannot be   or destroyed. It can be   ,   or dissipated.  \nDefine dissipation.  \n| The following questions Choose the answers from | are about energy stores and transfers in a printer. the box. | b\u003Cbr>|\n| --- | --- | --- |\n| by heating electrically internal (thermal) kinetic\u003Cbr>The printer transfers energy from the chemical energy in the power station to the moving parts of the printer. How is the energy transferred from the power station to the printer?  \u003Cbr>What is the final energy store?  \u003Cbr>Some of the energy to the printer is transferred to the surroundings. This energy is wasted. How is the energy transferred to the surroundings?   What is the final energy store?   |  |  |\n\n\n| For the following situations, suggest methods to reduce unwanted energy tra","cbCaiaQ6RU7uy8A8","https://ap.wps.com/l/cbCaiaQ6RU7uy8A8","pdf",788317,1,"English","en",105,"# Describe what a system is\n## Energy store changes for common objects\n# Kinetic energy and related units\n## Elastic potential energy and related units\n## Gravitational potential energy and related units\n## Thermal energy change and specific heat capacity\n# Power, energy transfer and equations\n## Power ratings and energy transferred per second\n## Comparing different bulbs by power and brightness\n# Conservation of energy and dissipation\n## Printer energy transfer and wasted energy\n## Reducing unwanted energy transfers\n# Conduction and thermal conductivity\n# Building energy loss and efficiency\n## Efficiency equations and closed-system total energy\n## Improving efficiency of an energy transfer\n# Energy resources and impacts","[{\"question\":\"What does the law of conservation of energy say in this unit?\",\"answer\":\"Energy cannot be created or destroyed. It can be transferred, stored or dissipated.\"},{\"question\":\"How do you calculate power and energy transferred using time?\",\"answer\":\"Use the relationship between power, energy transferred and time. The equations provided in the unit link these quantities, and power ratings can be used to find energy transferred per second.\"},{\"question\":\"What is efficiency and how can energy transfer efficiency be increased?\",\"answer\":\"Efficiency is linked to useful output energy (or useful power output) divided by total input energy (or total power input). Efficiency can be increased by reducing wasted energy transfers, such as unwanted transfers to the surroundings.\"}]","AQA Physics Unit 4.1 - Energy Foundation - Revision | PDF",1788601658,10,{"code":4,"msg":30,"data":31},"ok",{"site_id":23,"language":22,"slug":32,"title":13,"keywords":33,"description":14,"schema_data":34,"social_meta":84,"head_meta":86,"extra_data":88,"updated_unix":27},"aqa-physics-unit-41-energy-foundation-revision","",{"@graph":35,"@context":83},[36,52,66],{"@type":37,"itemListElement":38},"BreadcrumbList",[39,43,47,50],{"item":40,"name":41,"@type":42,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":44,"name":45,"@type":42,"position":46},"https://docshare.wps.com/document/","Document",2,{"item":48,"name":12,"@type":42,"position":49},"https://docshare.wps.com/document/exam/",3,{"item":51,"name":13,"@type":42,"position":11},"https://docshare.wps.com/document/aqa-physics-unit-41-energy-foundation-revision/207896/",{"url":51,"name":13,"@type":53,"author":54,"headline":13,"publisher":56,"fileFormat":59,"inLanguage":22,"description":14,"dateModified":60,"datePublished":60,"encodingFormat":59,"isAccessibleForFree":61,"interactionStatistic":62},"DigitalDocument",{"name":9,"@type":55},"Person",{"url":40,"name":57,"@type":58},"DocShare","Organization","application/pdf","2026-09-05",true,{"@type":63,"interactionType":64,"userInteractionCount":4},"InteractionCounter",{"@type":65},"ViewAction",{"@type":67,"mainEntity":68},"FAQPage",[69,75,79],{"name":70,"@type":71,"acceptedAnswer":72},"What does the law of conservation of energy say in this unit?","Question",{"text":73,"@type":74},"Energy cannot be created or destroyed. It can be transferred, stored or dissipated.","Answer",{"name":76,"@type":71,"acceptedAnswer":77},"How do you calculate power and energy transferred using time?",{"text":78,"@type":74},"Use the relationship between power, energy transferred and time. The equations provided in the unit link these quantities, and power ratings can be used to find energy transferred per second.",{"name":80,"@type":71,"acceptedAnswer":81},"What is efficiency and how can energy transfer efficiency be increased?",{"text":82,"@type":74},"Efficiency is linked to useful output energy (or useful power output) divided by total input energy (or total power input). 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