Raffles Institution 2018 Y4 FE Sections A and B

1 35 30 25 0 5 5 0 45 40 0 Section A [30 marks] Four possible answers A, B, C and D are given for each question. Choose the most appropriate answer and shade your answers in pencil on the OTAS answer sheet provided. 1 Which quantity is a base quantity? A length B heat C weight D potential difference 2 The diagrams below show the readings of a micrometer screw gauge when it is closed fully and when it is measuring the diameter of a marble. fully closed measuring diameter of marble What is the diameter of this marble? A 7.33 mm B 7.73 mm C 7.83 mm D 8.23 mm 3 A student carries out an experiment to investigate how the length of a pendulum will affect the period of oscillation of the pendulum bob. Throughout the experiment, the student realises that there are some steps that may result in errors in his results. A brief description of these steps are as follows: Step P: The length of pendulum is measured from a blunt edge of a metre rule. Step Q: The time taken for the oscillation of pendulum bob i s recorded using a handheld stopwatch. Step R: He starts timing the period of oscillation immediately upon the release of the pendulum.

2 Step S: The size of the pendulum bob is measured using a micrometer screw gauge with an initial reading of 0.01 mm when fully closed without any measurement. Which of the following shows the correct classification of the errors identified? systematic error(s) random error(s) A Step R, Step S Step P, Step Q B Step P, Step S Step Q, Step R C Step S Step P, Step Q, Step R D Step P, Step R, Step S Step Q 4 At the 9 km mark, a runner records an initial velocity of 2.00 m / s. Assume that at the last kilometre (from 9 km mark to the 10 km mark), the runner accelerates at an uniform rate of 0.0100 m / s2. How long does the runner take to travel the last kilometre? A 290 s B 500 s C 690 s D 2710 s 5 An object is thrown vertically up wards with an initial velocity, vo, and it returns to the same initial position in the absence of air resistance. If the same experiment is carried out in the presence of air resistance, which statement is false? A The time taken for the object to reach zero velocity is smaller. B The total distance travelled by the object is shorter. C The velocity when the object lands back at the initial position is smaller than vo. D The net acceleration is the same throughout the motion.

3 6 A crate of mass 5.00 kg, is placed on a rough slope inclined at angle, θ. It experiences a constant frictional force of 12.0 N along the slope. What is the minimum inclined angle of tilt θ before the crate starts to slide down the slope? A 0.245° B 13.9° C 14.2° D 75.8° 7 Which statement about mass and weight is true? A Weight changes with the planet’s gravitational field strength. B Mass changes with the planet’s gravitational field strength. C Mass is a vector quanti