Cambridge AssessmentCANDIDATENAMECENTRECANDIDATENUMBERNUMBERPHYSICS0625/42Paper 4 Theory(Extended)February/March 20231 hour 15 minutesYou must answer on the question paper.No additional materials are needed.INSTRUCTIONS.Answer all questions.Use a black or dark blue pen.You may use an HB pencil for any diagrams or graphs.Write your name,centre number and candidate number in the boxes at the top of the page.Write your answer to each question in the space provided..Do not use an erasable pen or correction fluid.Do not write on any bar codes.You may use a calculator.You should show all your working and use appropriate units.Take the weight of 1.0kg to be 9.8N(acceleration of free fall =9.8m/s2).INFORMATIONThe total mark for this paper is 80.The number of marks for each question or part question is shown in brackets ]This document has 16 pages.Any blank pages are indicated.DC(EF/SG)321611/2©UCLES2023[Turn over2BLANK PAGE©UCLES20230625/42/FM2331 (a)A boat crosses a river.The boat points at right angles to the river bank and it travels at aspeed of 3.5m/s relative to the water.A river current acts at right angles to the direction the boat points.The river current has aspeed of 2.5m/s.By drawing a scale diagram or by calculation,detemine the speed and direction of the boatrelative to the river bank.direction relative to the river bank =.........[4(b)Speed is a scalar quantity and velocity is a vector quantity.State the names of one other scalar quantity and one other vector quantity.SCalar quantityvector quantity ...............[2][Total:6]©UCLES20230625/42/F/M23