[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-207866-en":3,"doc-seo-207866-105":30,"detail-sidebar-cat-0-en-105":90},{"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":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},207866,137451207643,"Margaret","https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2",4,"Exam","AQA Science - Physics - Flashcards - Unit 19","Physics flashcards focused on core problem-solving for motions, forces, energy, power, efficiency, and electricity. Questions include calculating weight from mass and gravitational field strength, work from force and distance, spring constant using extension, distance and acceleration from speed-time information, and resultant force from mass and acceleration. Also covered are momentum, kinetic and gravitational potential energy, power from energy transfer rate, efficiency of energy conversion, wave speed from frequency and wavelength, and charge in circuits using current and time.","| 1. The diagram shows the forces acting on a parachutist in free fall.\u003Cbr>The parachutist has a mass of 75 kg.\u003Cbr>Calculate the weight of the parachutist. Gravitational field strength = 10 N/kg\u003Cbr>Show clearly how you work out your answer and give the unit.\u003Cbr>Weight =\u003Cbr>| weight = mass × gravitational field strength\u003Cbr>􀜹 = 􀝉 􀝃\u003Cbr>• weight, N\u003Cbr>• mass, kg\u003Cbr>• gravitational field strength, m/s2 |\n| --- | --- |\n| 2. A pulley is used to lift some bricks up. The weight of the bricks is 100 N and they are lifted 3 m.\u003Cbr>Calculate the work done on the bricks.\u003Cbr>Answer ....................................... J | work done = force × distance\u003Cbr>􀜹 = 􀜨􀝏\u003Cbr>• work done, J\u003Cbr>• force, N\u003Cbr>• distance, m |\n| 3. A weight is placed on a spring to stretch the spring elastically from a length of\u003Cbr>23 cm to a new length of 30 cm. The weight is 343 N.\u003Cbr>Write down the equation which links compression, force and spring constant.\u003Cbr>Calculate the spring constant of the spring. Give your answer in newtons per metre.\u003Cbr>............................................... N/m | force applied to a spring = spring constant × extension\u003Cbr>􀜨 = 􀝇 􀝁\u003Cbr>• force applied to spring, N\u003Cbr>• spring constant, N/m\u003Cbr>• extension, m |\n\n\n| 4. A van was driven for 20 seconds at a speed of 30 m/s.\u003Cbr>Calculate the distance travelled.\u003Cbr>Distance = .................... m | distance = speed × time\u003Cbr>􀝏 = 􀝒 􀝐\u003Cbr>• distance, m\u003Cbr>• speed, m/s\u003Cbr>• time, s |  |\n| --- | --- | --- |\n| 5. A van was travelling at 30 m/s. It slowed\u003Cbr>to a stop in 12 seconds. Calculate the van’s acceleration.\u003Cbr>Acceleration = ................... m/s2 | acceleration = | change in velocity time taken |\n|  | ∆􀝒\u003Cbr>􀜽 = ~~ ~~􀝐\u003Cbr>• acceleration, m/s2\u003Cbr>• change in velocity, m/s\u003Cbr>• time taken, s |  |\n| 6. The mass of a car is 1120 kg. The mass of the driver is 80 kg.\u003Cbr>Calculate the resultant force acting on the car and driver while accelerating at 5.6 m/s2\u003Cbr>Resultant force = .............. N | resultant force = mass × acceleration\u003Cbr>􀜨 = 􀝉 􀜽\u003Cbr>• resultant force, N\u003Cbr>• mass, kg\u003Cbr>• acceleration, m/s2 |  |\n\n\n| 7. |  |  | Higher Tier only\u003Cbr>momentum = mass × velocity\u003Cbr>􀝌 = 􀝉 􀝒\u003Cbr>• momentum, kg m/s\u003Cbr>• mass, kg\u003Cbr>• velocity, m/s |\n| --- | --- | --- | --- |\n| \u003Cbr> Vehicle | Speed (m/s) | Mass (kg)  |  |\n| \u003Cbr> Motorbike | 14 | 175  |  |\n| \u003Cbr> Lorry | 14 | 10 000  |  |\n| \u003Cbr> Van | 14 | 3 000  |  |\n| \u003Cbr>Which vehicle has the greatest momentum?\u003Cbr>Give a reason:\u003Cbr>Showing your working, calculate the momentum of the motorbike: |  |  |  |\n| 8. The molten rock flowing from an erupting volcano can reach a speed of 8 m/s.\u003Cbr>i. Write down the equation that links kinetic energy, mass and speed.\u003Cbr>ii. Calculate the kinetic energy of\u003Cbr>1 tonne of molten rock flowing at 8 m/s.\u003Cbr>(1 tonne = 1 000 kg) Kinetic energy = ............ joules |  |  | kinetic energy = 0.5 × mass × (speed)2\u003Cbr>1 2\u003Cbr>􀜧􀯞 = 2􀝉 􀝒\u003Cbr>• kinetic energy, J\u003Cbr>• mass, kg\u003Cbr>• speed, m/s |\n| 9. A child has a mass of 18 kilograms, he goes down the slide.\u003Cbr>The vertical distance from the top to the bottom of the slide is 2.5 metres.\u003Cbr>Calculate the decrease in gravitational potential energy of the child sliding from the top to the bottom of the slide.\u003Cbr>Gravitational field strength = 10 N / kg …………………. N / kg |  |  | Gravitational potential energy (GPE) equation:\u003Cbr>GPE = mass × gravitational field strength × height 􀜧􀝌 = 􀝉 􀝃 ℎ\u003Cbr>• gravitational potential energy, J\u003Cbr>• mass, kg\u003Cbr>• gravitational field strength, N/kg\u003Cbr>• height, m |\n\n| 10. It takes a climber 800 seconds to climb to the top of a 20 metre cliff.\u003Cbr>During this time the energy transferred to the climber equals 12 000 J.\u003Cbr>Calculate the power of the climber during the climb.\u003Cbr>Power = ................................... W | power = | energy transferred time |  |\n| --- | --- | --- | --- |\n|  |  | 􀜲 = | 􀜧\u003Cbr>􀝐 |\n|  | • power, W\u003Cbr>• energy transferred, J\u003Cbr>• time, s |  |  |\n| 11.A student did 2240 J of work going from the bottom of the stairs to the top of th","cbCaiaCelM0LNA1x","https://ap.wps.com/l/cbCaiaCelM0LNA1x","pdf",207846,1,9,"English","en",105,"# Kinematics and Forces\n## Weight, Work and Springs\n## Speed, Acceleration and Resultant Force\n## Momentum, Energy and Power\n# Electricity and Waves","[{\"question\":\"How do I calculate weight for an object in free fall?\",\"answer\":\"Use weight = mass × gravitational field strength, then state the unit in newtons (N).\"},{\"question\":\"What equation links work done, force, and distance?\",\"answer\":\"Work done = force × distance, giving the answer in joules (J).\"},{\"question\":\"How do I calculate the speed of a sound wave from frequency and wavelength?\",\"answer\":\"Apply wave speed = frequency × wavelength, then use metres per second (m/s).\"}]","AQA Science - Physics - Flashcards - Unit 19 | PDF",1788601480,23,{"code":4,"msg":31,"data":32},"ok",{"site_id":24,"language":23,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":85,"head_meta":87,"extra_data":89,"updated_unix":28},"aqa-science-physics-flashcards-unit-19","",{"@graph":36,"@context":84},[37,53,67],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,51],{"item":41,"name":42,"@type":43,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":47},"https://docshare.wps.com/document/","Document",2,{"item":49,"name":12,"@type":43,"position":50},"https://docshare.wps.com/document/exam/",3,{"item":52,"name":13,"@type":43,"position":11},"https://docshare.wps.com/document/aqa-science-physics-flashcards-unit-19/207866/",{"url":52,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":61,"encodingFormat":60,"isAccessibleForFree":62,"interactionStatistic":63},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":41,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-09-05",true,{"@type":64,"interactionType":65,"userInteractionCount":4},"InteractionCounter",{"@type":66},"ViewAction",{"@type":68,"mainEntity":69},"FAQPage",[70,76,80],{"name":71,"@type":72,"acceptedAnswer":73},"How do I calculate weight for an object in free fall?","Question",{"text":74,"@type":75},"Use weight = mass × gravitational field strength, then state the unit in newtons (N).","Answer",{"name":77,"@type":72,"acceptedAnswer":78},"What equation links work done, force, and distance?",{"text":79,"@type":75},"Work done = force × distance, giving the answer in joules (J).",{"name":81,"@type":72,"acceptedAnswer":82},"How do I calculate the speed of a sound wave from frequency and wavelength?",{"text":83,"@type":75},"Apply wave speed = frequency × wavelength, then use metres per second (m/s).","https://schema.org",{"og:url":52,"og:type":86,"og:title":13,"og:site_name":58,"og:description":14},"article",{"robots":88,"canonical":52},"index,follow",{"doc_id":7,"site_id":24},{"code":4,"msg":5,"data":91},[92,96,100,103,108,113,118,123,127,130,134],{"id":20,"doc_module":4,"doc_module_name":46,"category_name":93,"show_sort_weight":94,"slug":95},"Story & Novel",90,"story-novel",{"id":47,"doc_module":4,"doc_module_name":46,"category_name":97,"show_sort_weight":98,"slug":99},"Literature",80,"literature",{"id":11,"doc_module":4,"doc_module_name":46,"category_name":12,"show_sort_weight":101,"slug":102},70,"exam",{"id":104,"doc_module":4,"doc_module_name":46,"category_name":105,"show_sort_weight":106,"slug":107},5,"Comic",60,"comic",{"id":109,"doc_module":4,"doc_module_name":46,"category_name":110,"show_sort_weight":111,"slug":112},6,"Technology",50,"technology",{"id":114,"doc_module":4,"doc_module_name":46,"category_name":115,"show_sort_weight":116,"slug":117},7,"Healthcare",40,"healthcare",{"id":119,"doc_module":4,"doc_module_name":46,"category_name":120,"show_sort_weight":121,"slug":122},8,"Research & Report",30,"research-report",{"id":21,"doc_module":4,"doc_module_name":46,"category_name":124,"show_sort_weight":125,"slug":126},"Religion & Spirituality",20,"religion-spirituality",{"id":125,"doc_module":4,"doc_module_name":46,"category_name":128,"show_sort_weight":125,"slug":129},"World Cup","world-cup",{"id":131,"doc_module":4,"doc_module_name":46,"category_name":132,"show_sort_weight":131,"slug":133},10,"Lifestyle","lifestyle",{"id":135,"doc_module":4,"doc_module_name":46,"category_name":136,"show_sort_weight":104,"slug":137},19,"General","general"]