canberra Prelim_4E5N_SciPhy_P2.

CANBERRA SECONDARY SCHOOL 2020 Preliminary Examination Secondary Four Express / Five Normal Academic SCIENCE PHYSICS5076/02 14 Aug 20201 hour 15 minutes0830h – 0945h Name:______________________________________ () Class:________ READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to doso. Writeyour full name, classandindexnumber inthespacesprovidedonthequestionpaperand on any separate writing papers used.Write in dark blue or black pen.You may use a pencil for any diagrams or graphs.Do not use staples, paper clips, highlighters, glueor correction fluid. Section AAnswerallquestions.Write your answers in the spaces provided on the questionpaper. Section BAnsweranytwoquestionsWrite your answers in the spaces provided in the questionpaper. At the end of the examination, fasten all your worksecurely together.The number of marks is given in brackets [ ] at theend of each question or part question.FOR MARKER’S USEMarksAwarded MaxMarks Section A 45 Section B 20 Total 65

2 This question paper consists of15printed pages includingthe cover page. Setter: Mrs Olivia Ho

3 Section A [45 marks] Answerallthe questions.Write your answers in the spaces provided in the questionpaper. 1 Amarbleistossedupverticallyat aninitial speedof 10m/s. It movesuptothehighest point at t=x, before falling down and hittingthe ground after 2.5 s.The speed-time graph of the marble is shown below. The air resistance is negligible, and the gravitational field strength is 10 N/kg. (a) Describe the motion of the marble fromt= 0 tot= 2.5 s. …………………………………………………………………………………….. …………………………………………………………………………………….. …………………………………………………………………………………….. [2] (b) Calculate the value of x. x= ……………………. s[1] (c) Calculate the distance travelled by the marble beforeit reaches the highestpoint. [1]________________________________________________________________________________________________Canberra Secondary School Science Physics 5076/022020 Preliminary Examination Secondary 4 Express/ 5 Normal Academic

4 distance =…………………….m(d) Hence or otherwise, calculate the height above theground from which themarble is tossed. height =…………………….m [2] 2 The cruise ship Costa Fortuna has a mass of 50379000 kg. When it isembarkingonajourney, tugboats(T) areneededtomoveit outoftheport.Thediagram below (not to scale) shows the arrangement of two tugboats. Eachtugboat pulls with a force of 600 kN. (a) By drawing a scaled diagram, determine the magnitudeand direction of theresultant force of the two tugboats. magnitude =…………………….N [2] [1] ________________________________________________________________________________________________Canberra Secondary School Science Physics 5076/022020 Preliminary Examination Secondary 4 Express/ 5 Normal Academic

5 direction =…………………….………….[1](b) Hence, calculate the acceleration of Costa Fortunaas it leaves the dock. acceleration =…………………….m/s 2 [1] 3 The diagram below shows a rollercoaster. The cart, when fully loaded, has amass of 500 kg. At positionA, the