2021 4E Prelim PHY P1

Name of Candidate: _____________________ ( ) Class: ______ Calculator Model: This paper consists of 17 printed pages BUKIT PANJANG GOVERNMENT HIGH SCHOOL PRELIMINARY EXAMINATION 2021 SECONDARY 4 EXPRESS PHYSICS Paper 1 6091 / 01 Date: 31 August, 2021 Duration: 1 hour Time: 0745-0845 READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class, and index number on the OAS in the spaces provided. There are forty questions in this paper. Answer all questions. For each question, there are four possible answers A, B, C or D. Choose the one you consider correct and record your choice in soft pencil on the OAS provided. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of scientific calculator is expected, where appropriate. Setter: Ms. Le Nam Chi [Turn over FOR EXAMINER’S USE Total: / 40 Additional Materials: OAS

2 1 The angular momentum of an object in a circular orbit can be calculated using the formula: Angular momentum = mass x velocity x radius of orbit What is the derived SI unit of angular momentum? A kgm-2 B kgm2s-1 C kgms2 D kgms-2 2 A stone is dropped from a tall building. 5 seconds later, an identical stone is dropped from the same height. Which of the following statements is correct about the motion of the two stones before they hit the ground? Assume air resistance is negligible. A The distance between the stones will remain constant throughout. B The distance between the stones will increase with time. C The distance between the stones will decrease with time then remain constant. D The distance between the stone will decrease with time. 3 Which of the following diagram represents the velocity-time graph of an object when a constant force is applied on it? A B C D velocity velocity velocity velocity time time time time

3 4 A block accelerates at 1.7 ms-2 from a height of 0.21 m down a smooth plank from rest. The plank is inclined at an angle of 10° to the horizontal. What is the speed of the block at the bottom of the plank? A 0.83 ms-1 B 2.0 ms-1 C 4.8 ms-1 D 14 ms-1 5 To pull a tree stump out of the ground, two tractors pull on ropes in different directions. The diagram, not drawn to scale, shows the view from the top. Which of the following options shows the most likely resultant force? A B C D block 1000 N 1500 N [Turn over 0.21 m 10°

4 6 The diagram bel