Zeerust Combined School Assignments Grade 12 Learners for June Exams 2021 Question 1 1. Block X has a mass of 4 kg and Block Y has a mass of 2 kg, Block X is placed on a rough table that has a coefficient of static friction of 0.18. Block X and Block Y are joined by a light, inextensible string over a frictionless pulley and Block Z is placed on top of Block X as shown in the diagram below. 2 x y The system, as shown in the diagram, is only just at rest and on the limit of sliding. 1.1 Determine the tension in the rope joining Block X and Block Y while the system is at rest. (2) (2) 1.2 Define a frictional force. 1.3 State the magnitude of the frictional force required for Block X to be at rest. (2) (5) 1.4 Calculate the minimum mass of Block Z to stop Block X from sliding.​

Acetic acid  /əˈsiːtɪk/, systematically named  ethanoic acid  /ˌɛθəˈnoʊɪk/, is a colourless liquid  organic compound  with the  chemical formula  ch3cooh (also written as ch3co2h or c2h4o2). when undiluted, it is sometimes called  glacial acetic acid.  vinegar  is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water. acetic acid has a distinctive sour taste and pungent smell. in addition to household vinegar, it is mainly produced as a precursor to  polyvinyl acetate  and  cellulose acetate. it is classified as a  weak acid  since it only partially  dissociates  in solution, but concentrated acetic acid is corrosive and can attack the skin.acetic acidnamespreferred iupac nameacetic acidsystematic iupac nameethanoic acidother namesvinegar (when dilute); hydrogen acetate; methanecarboxylic acid[1][2]identifierscas number64-19-7  3d model (jsmol)interactive image3dmetb00009 reference506007chebichebi: 15366  chemblchembl539  chemspider171  drugbankdb03166  echa infocard100.000.528ec number200-580-7e numbere260  (preservatives)gmelin reference1380iuphar/bps1058keggd00010  meshacetic+acidpubchem  cid176rtecs numberaf1225000uniiq40q9n063p  un number2789inchiinchi=1s/c2h4o2/c1-2(3)4/h1h3,(h,3,4)  key:   qtbsbxvteameqo-uhfffaoysa-n  smilescc(o)=o

Earthplanet yplanet y5=earth     *many different equationsplanet x1.5=earthplanet x is two times planet yobject 5,2500 mass5,1,3,2,4object 1 is four times obect 4

Pe = 1/2k(x)^2  and .05n/m = .05x10^-9m = x