uestions","basePath":"/gcse/physics/edexcel/newton-s-laws-and-momentum/questions","formulaUrl":null,"initialIndex":99,"initialQuestionWindow":[{"id":"da3e7d6e-7eaa-43c4-9617-e49a38d31860","revisionId":"d4a5db75-6c89-460c-8ec6-586a2e44c9e8","questionNumber":null,"questionType":"LA","specification":"A comet travelling through space has a momentum of $1.35 \\times 10^{12}\\text{ kg m/s}$ and a mass of $4.5 \\times 10^7\\text{ kg}$.","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"9f3daab3-7005-47d5-a58b-792199af69d8","label":null,"content":"Calculate the speed of the comet.","markscheme":"- Rearranges $\\text{momentum} = \\text{mass} \\times \\text{speed}$ and substitutes the given values: $\\dfrac{1.35 \\times 10^{12}}{4.5 \\times 10^7}$ M1\n- Calculates the correct speed of $30\\,000\\text{ m/s}$ (or $3.0 \\times 10^4\\text{ m/s}$) A1","marks":2,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"rearrange_momentum","label":"Rearrange the momentum equation","steps":[{"type":"text","order":0,"title":"Choose the equation","content":"Use the momentum equation:\n\n$$p=mv$$\n\nHere $p$ is momentum, $m$ is mass and $v$ is speed. We need the speed, so make $v$ the subject."},{"type":"hyper_latex","block":{"nodes":[{"latex":"p=mv"},{"latex":"\\frac{p}{\\htmlData{anchor=mass-divided}{m}}=\\frac{mv}{m}"},{"latex":"v=\\frac{p}{\\htmlData{anchor=mass-denominator}{m}}"}],"connections":[{"to":"mass-denominator","from":"mass-divided","color":"sky","label":"divide by mass"}]},"order":1,"title":"Make speed the subject","description":"Divide both sides by the mass to leave speed on its own."},{"type":"hyper_latex","block":{"nodes":[{"latex":"v=\\frac{p}{m}"},{"latex":"v=\\frac{1.35\\times10^{12}}{4.5\\times10^{7}}"},{"latex":"v=30\\,000\\ \\mathrm{m/s}"}]},"order":2,"title":"Substitute the values","description":"Rearranging to v = p/m and substituting the given values earns the M1 mark. Calculating 30 000 m/s earns the A1 mark."}]}],"generatedAt":"2026-07-22T12:03:11.795Z","modelVersion":"gpt-5.6-terra+diagrams-1","explanationVersion":"v3"},"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"e1aed91f-314f-4d91-a680-19553c6c8a3e","revisionId":"1acb931e-1bf0-4593-98d1-39a190aa5a13","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"easy","totalMarks":3,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"de634515-5810-4564-badf-1f2671d77d2c","label":null,"content":"An oxygen molecule of mass $5.3 \\times 10^{-26}\\text{ kg}$ is moving with a velocity of $460\\text{ m/s}$.\n\nCalculate the momentum of the oxygen molecule.\n\nShow your working.","markscheme":"- Recalls or uses the formula $p = mv$ (or $\\text{momentum} = \\text{mass} \\times \\text{velocity}$) B1\n- Substitutes values into the formula: $5.3 \\times 10^{-26} \\times 460$ M1\n- Calculates the momentum as $2.4 \\times 10^{-23}\\text{ kg m/s}$ (or $2.44 \\times 10^{-23}\\text{ kg m/s}$) with units A1","marks":3,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"formula_substitution","label":"Use momentum formula","steps":[{"type":"text","order":0,"title":"Choose the formula","content":"Momentum is found by multiplying mass by velocity:\n\n$$p=mv$$\n\nHere, $p$ is momentum, $m$ is mass and $v$ is velocity. Writing this formula earns the **B1** mark.","highlights":[{"text":"Calculate the momentum of the oxygen molecule.","location":"specification"}]},{"type":"hyper_latex","block":{"nodes":[{"latex":"\\htmlData{anchor=formula}{p=mv}"},{"latex":"p=\\htmlData{anchor=substitution}{\\color{@sky}{5.3\\times10^{-26}\\times460}}"}],"connections":[{"to":"substitution","from":"formula","color":"sky","label":"substitute"}]},"order":1,"title":"Substitute the values","description":"Put the mass and velocity into the formula shown. This substitution earns the M1 mark."},{"type":"hyper_latex","block":{"nodes":[{"latex":"p=\\htmlData{anchor=unrounded}{\\color{@sk

Newton's laws and momentum

Question 56

Newton's laws and momentum Questions

Newton's laws and momentum

Question 56

Newton's laws and momentum Questions