stions","basePath":"/gcse/physics/edexcel/newton-s-laws-and-momentum/questions","formulaUrl":null,"initialIndex":65,"initialQuestionWindow":[{"id":"845d29eb-b3a2-4056-b739-0d4dd243e947","revisionId":"237487a6-9011-4b71-8180-0aff20121628","questionNumber":null,"questionType":"LA","specification":"An automated space probe of mass $450\\text{ kg}$ is sent to explore the surface of Saturn's largest moon, Titan. The weight of this probe on the surface of Titan is measured to be $607.5\\text{ N}$.","difficulty":3,"difficultyBand":"easy","totalMarks":3,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"d0bc4838-4ec4-4f18-8059-2b0fd1b3198a","label":null,"content":"Calculate the acceleration due to gravity on the surface of Titan, stating the units of your answer.","markscheme":"- Uses $W = mg$ to write a valid equation or rearrangement, e.g. $607.5 = 450 \\times g$ or $g = \\frac{607.5}{450}$ M1\n- Calculates the correct numerical value of $1.35$ A1\n- States the correct units of $\\text{m/s}^2$ or $\\text{N/kg}$ B1","marks":3,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"weight_equation","label":"Use the weight equation","steps":[{"type":"hyper_latex","block":{"nodes":[{"latex":"W=mg"},{"latex":"607.5\\ \\mathrm{N}=\\htmlData{anchor=mass}{450\\ \\mathrm{kg}}\\times g"},{"latex":"g=\\frac{607.5\\ \\mathrm{N}}{\\htmlData{anchor=mass-used}{450\\ \\mathrm{kg}}}"}],"highlights":[{"color":"amber","anchor":"mass-used"}],"connections":[{"to":"mass-used","from":"mass","color":"amber","label":"divide by mass"}]},"order":1,"title":"Rearrange for gravity","description":"Substitute the measured weight and mass into $W=mg$, then divide by the mass. This rearrangement earns the M1."},{"type":"hyper_latex","block":{"nodes":[{"latex":"g=\\frac{607.5\\ \\mathrm{N}}{450\\ \\mathrm{kg}}"},{"latex":"g=\\htmlData{anchor=value}{1.35\\ \\mathrm{N/kg}}"},{"latex":"g=\\htmlData{anchor=equivalent}{1.35\\ \\mathrm{m/s^2}}"}],"highlights":[{"color":"green","style":"box","anchor":"value"},{"color":"green","style":"box","anchor":"equivalent"}]},"order":2,"title":"Calculate the value","description":"Now divide the weight by the mass. The numerical value earns the A1; either unit shown is accepted for the final mark."}]}],"generatedAt":"2026-07-22T11:34:35.091Z","modelVersion":"gpt-5.6-terra+diagrams-1","explanationVersion":"v3"},"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"8ccf4a33-76f2-4906-b7e1-034929c5932b","revisionId":"9d02c4cf-4fd5-4607-887a-719150c741b0","questionNumber":null,"questionType":"LA","specification":"A robotic weather station has a mass of $120\\text{ kg}$. On the surface of Mars, the weight of this weather station is $444\\text{ N}$.","difficulty":3,"difficultyBand":"easy","totalMarks":3,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"36404f26-afa5-417e-bebb-8c01a3213633","label":null,"content":"Calculate the gravitational field strength on the surface of Mars.","markscheme":"- States or uses the equation $W = mg$ or rearranged as $g = \\frac{W}{m}$ with substitution of values, e.g. $g = \\frac{444}{120}$ M1\n- Obtains the value of $3.7$ A1\n- States the correct unit of $\\text{N/kg}$ (or $\\text{m/s}^2$) B1","marks":3,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"weight_equation","label":"Use the weight equation","steps":[{"type":"text","order":1,"title":"Choose the equation","content":"Weight is the gravitational force acting on an object. Use\n\n$$W = mg$$\n\nwhere $W$ is weight in newtons, $m$ is mass in kilograms, and $g$ is gravitational field strength. The question gives $W=444\\text{ N}$ and $m=120\\text{ kg}$, and asks for $g$.","highlights":[{"text":"mass of $120\\text{ kg}$","location":"specification"},{"text":"weight of this weather station is $444\\text{ N}$","location":"specification"},{"text":"Calculate the gravitational field strength","location":"specification"}]},{"type":"hyper_latex","block":{"nodes":[{"latex":"\\htmlData{anchor=weight_equation}{

Newton's laws and momentum

Question 35

Newton's laws and momentum Questions

Newton's laws and momentum

Question 35

Newton's laws and momentum Questions