2023 VJC Prelim P1 QP

VICTORIA JUNIOR COLLEGE 2023 JC2 PRELIMINARY EXAMINATION Higher 1 Name : __________________________ CT group : ________________ PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 8867/01 25 September 2023 MONDAY 2.00 pm to 3.00 pm (1 hour) READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name and Civics Group on the Answer Sheet in the spaces provided unless this has been done for you. DO NOT WRITE ON ANY BARCODES. There are thirty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. 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 an approved scientific calculator is expected, where appropriate. This document consists of 16 printed pages.

2 Data speed of light in free space c = 3.00  108 m s-1 elementary charge e = 1.60  10-19 C unified atomic mass constant u = 1.66  10-27 kg rest mass of electron me = 9.11  10-31 kg rest mass of proton mp = 1.67  10-27 kg the Avogadro’s constant NA = 6.02 × 1023 mol-1 gravitational constant G = 6.67 × 10-11 N m2 kg-2 acceleration of free fall g = 9.81 m s-2 Formulae uniformly accelerated motion s = ut +( ½) at2 v2 = u2 + 2as resistors in series R = R1 + R2 + … resistors in parallel 1/R = 1/R1 + 1/R2+ …

3 H1 P1 - Phy Qty and Units MCQ 1 Which of the following equations cannot be correct? (E = energy, p = momentum, c = speed of light, m = mass,) A E pc B 2 2 2 2 4E p c m c  C 2E p c D 2 2 pE m H1 P1 - Errors and UncertainƟes MCQ 2 A certain experiment is carried out such that 2 6 BCA D If A = (2.0  0.1), C = (4.10  0.05), D = (3.45  0.01), what is the percentage uncertainty of B? A 2.9 % B 7.1 % C 7.7 % D 46 % H1 P1 - Errors and UncertainƟes 3 A student repeated a measurement three times and obtained measurements of masses 35.23 g, 37.21 g and 38.25 g. A second student did the same but obtained 37.23 g, 37.21 g and 37.25 g. What can be said of the second student’s measurements compared to those of the first? A More accurate B More precise C Less accurate D Less precise

4 H1 P1 KinemaƟcs 4 The motions of two objects P and Q along a straight line are shown in the following velocity-time graphs. How do the magnitudes of the displacement and the total distance travelled compare for the two objects from time 0 to time t2? displacement distance A different different B different same C same different D same same H1 P1 KinemaƟcs 5 A toy aeroplane is flying above the ground at a constant horizontal velocity of 5.0 m s -1 when the toy pilot is ejected. The aeroplane propels the toy pilot upward from a height of 2.4 m above the ground so that the vertical component of his speed is initially 3.0 m s-1. With what speed does the toy pilot hit the ground? Ignore the effects of air resistance. A 3.7 m s-1 B 5.8 m s-1 C 7.5 m s-1 D 9.0 m s-1

5 H1 P1 Dynamics 6 A magnetic field is created using two bar magnets. Two charged vertical plates are placed near the magnets as shown. A charged oil drop moves in a horizontal straight line at constant speed in the air between the two plates. Which equation about the magnitude of the forces acting on the charged oil drop must be correct? A air resistance = gravitational force B air resistance = magnetic force C electric force = magnetic force D gravitational force = magnetic force H1 P1 Dynamics 7 Masses of 8.0 kg and 2.0 kg hang from a light inextensible cord passing over a pulley. The pulley exerts friction on the cord that is equivalent to a force of 3.0 N at the circumference. When the masses are released, they move in the direction of the arrows. What is their acceleration? A 5.6 m s-2 B 5.9 m s-2 C 6.2 m s-2 D 9.3 m s-2

6 H1 P1 Dynamics 8 Two trolleys P and Q approach each other and collide. The graph shows the variation with time t of the force F of P on Q. Which graph, drawn to the same scale, shows the variation with time t of the force F of Q on P? Forces (H1 P1 MCQ 1) 9 A 30 N and a 40 N force act concurrently on an object. If their resultant is 50 N, then the angle between the two forces is A 00 B 600 C 900 D 1800

7 Forces (H1 P1 MCQ 2) 10 A one-metre-long beam of negligible mass is suspended at its two ends from two springs attached to the ceiling. The two springs are initially of the same length when no load is applied to them. The force constant of the left spring is twice that of the right spring. A mass is suspended using a string from the beam, and the position of its point of attachment is adjusted until the beam is horizontal. What is the distance x of the point P of the mass from the left end of the beam when it is horizontal? A 0.20 m B 0.25 m C 0.33 m D 0.50 m Forces (H1 P1 MCQ 3) 11 A stone is suspended from the horizontal bar of a retort stand using a string. Which of the following pairs of forces do not form a Newton’s third law pair? Force 1 Force 2 A Weight of the stone Force exerted by stone on Earth B Force exerted by stone on ceiling Force exerted by ceiling on stone C Force exerted by stone on string Force exerted by string on stone D Weight of the stone Force exerted by string on stone W x 1.00 m P beam

8 WEP (H1 P1 MCQ 1) 12 A 500 g mass and a 200 g mass are connected by an inextensible rope that passes over a pulley of radius 3.5 cm. The pulley is attached to the axle of a motor, which exerts a torque on the rope to lower the 500 g mass while raising the 200 g mass. If the pulley rotates with a constant angular speed of 2.4 rad s-1, what is rate of work done by the motor? Assume that there is no slipping between the rope and the pulley. A 2.94 W B 0.25 W C 0.084 W D 7.1 W WEP (H1 P1 MCQ 2.) 13 The tension F in a spring varies with its length L according to the following graph. The unstretched spring is then suspended from the rod of a retort stand, and a 150 g mass is attached to its lower end, and then released. What is the maximum length of the spring? A 4.9 cm B 9.8 cm C 14.8 cm D 19.6 cm 500 g 200 g 2.4 rad s-1 Motor axle F / N L / cm 0 5.0 20.0 4.5

9 WEP (H1 P1 MCQ 3) 14 Two carts of masses 2m and m move with identical initial speeds u toward each other. A spring attached to the front of the heavier cart is compressed when the carts collide. The spring is shortest when the carts are moving with the same velocity. What is the elastic potential energy stored in the spring when it is at its minimum length due to the compression? A 21 4 mu B 21 2 mu C 23 4 mu D 24 3 mu H1 P1 Circular moƟon 15 In a racetrack, a circular corner of radius r is banked at an angle of  to the horizontal. The maximum friction between the track and a car of mass m is f. If the maximum speed with which it can negotiate the turn without any skidding is v, which of the following equations is correct? A 2 osin c s mvf rN    B 2 osin c s mvf rN    C 2 icos s n mvf rN    D 2 icos s n mvf rN    16 In the track and field event of the men’s discus throw, a 2.0 kg discus is thrown at a speed of around 24.0 m s-1 by a competitor. If we assume that the path of the discus is approximately circular with a radius of 1.2 m when thrown, what is the angular velocity of the discus? A 20 rad s-1 B 29 rad s-1 C