2024 DHS Prelim H1 Phy P1

1 © DHS 2024 8867/01 [Turn over Name: Centre/Index Number: Class: DUNMAN HIGH SCHOOL Preliminary Examination Year 6 H1 PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 8867/01 23 September 2024 1 hour READ THESE INSTRUCTIONS FIRST Write your centre number, index number, name and class at the top of this page. Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. 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 © DHS 2024 8867/01 [Turn over 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 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 + 1 2 at2 v2 = u2 + 2as resistors in series, R = R1 + R2 + . . . resistors in parallel, 1/R = 1/R1 + 1/R2 + . . .

3 1 Which expression could be correct for the velocity v of the ocean waves in terms of the density of sea water ρ, the acceleration of free fall g, the depth of the ocean h, and the wavelength ߣ? A ඨ g ρ B ටg h C ඥρgh D ඥgλ 2 Two forces of magnitudes 4 N and 6 N are applied to a point Which of the following could not be the magnitude of their resultant? A 1 N B 4 N C 6 N D 10 N 3 A steel rule, reading to ± 1 mm, gives the following results when used to measure the length of a bar. 892 mm, 891 mm, 892 mm, 891 mm, 891 mm, 892 mm If the true length of the bar is 895 mm, which row in the table is correct? results are accurate to within 1 mm results are precise to within 1 mm A no yes B no no C yes yes D yes no 4 A motorcycle stunt -rider rides off a ramp inclined at 30 .0° to the horizontal at a speed of 22.0 m s-1. He reaches a maximum height of 13.0 m from the ground before he lands on the ground. What is his velocity just before he lands on the ground? A 19.1 m s-1 B 24.9 m s-1 C 26.1 m s-1 D 27.2 m s-1

4 © DHS 2024 8867/01 [Turn over 5 A car starts from rest and travels along a straight road. The graph below shows the variation with time t of its acceleration a, during part of the journey. At which points on the graph does the car have its greatest speed and greatest displacement? greatest displacement greatest speed A K J B K M C L L D M K 6 A 6.0 kg mass is connected to a 10 kg mass by a rope and was left to hang freely from a pulley as shown in the diagram below. What is the tension in the string? A 39 N B 59 N C 74 N D 98 N 10 kg 6.0 kg L M K J a t 0

5 © DHS 2024 8867/01 [Turn over 7 A stone, falling vertically through air at its terminal velocity, strikes a soft ground and suffers a constant deceleration until it stops. The time of impact is denoted by P. Which graph best represents the variation with time t of the momentum p on the stone? A B C D 8 Two objects collide inelastically. Which row is correct? kinetic energy momentum A conserved conserved B conserved not conserved C not conserved conserved D not conserved not conserved P p t P p t P p t P p t

6 © DHS 2024 8867/01 [Turn over 9 A light rod, acted upon by 3 forces, P, Q, and R is in equilibrium. Which of the following diagram shows the possible positions and directions of the forces? A B C D 10 A spring that obeys Hooke’s law has an unstretched length of 60 mm and a spring constant of 500 N m-1. What is the tension in the spring when it is stretched to 90 mm? A 15 N B 45 N 1500 N D 45000 N 11 The diagram shows two equal and opposite forces applied to the ends of a bar of length L. What is the magnitude of the torque exerted by these forces on the bar? A FL cos ߠ B FL sin ߠ C 2FL cos ߠ D 2FL sin ߠ P Q R P Q R P Q R P Q R

7 © DHS 2024 8867/01 [Turn over 12 A hydroelectric power station is shown. Water is supplied from a reservoir which is 80m above the power station. The water passes through the turbines of the power station at a rate of 6.0 m3 s-1. Assume that the density of water is 1000 kg m-3. If the efficiency of the power station is 60%, what is the electrical power output? A 0.29 MW B 1.9 MW C 2.8 MW D 4.7 MW 13 A spring of original length 100 mm is compressed by a force. The graph shows the variation with length L of the spring of the compressing force F. What is the energy stored in the spring when the length is 70 mm? A 0.09 J B 0.21 J C 0.27 J D 0.63 J

8 © DHS 2024 8867/01 [Turn over 14 A locomotive, which delivers a constant power, is used to pull a train of total mass 3.0 × 105 kg against a constant frictional force of 5.0 × 104 N. When travelling at 10 m s -1, the acceleration of the train is 0.50 m s-2. What is the maximum speed of the train on a level track? A 20 m s-1 B 30 m s-1 C 40 m s-1 D 50 m s-1 15 A small ball enters a vertical circular loop with speed v such that the ball is just able to complete the loop as shown. The angular velocity of the ball is A zero at the top of the circle. B the same at the top and bottom of the circle. C smallest at the bottom of the circle and largest at the top of the circle. D largest at the bottom of the circle and smallest at the top of the circle. 16 A disc is rotated clockwise about its centre O until point P has moved to point Q, such that OP is equal in length to the straight-line PQ. What is the angular displacement of OQ relative to OP? A ଵ ଷߨ rad B ଶ ଷߨ rad C ସ ଷߨ rad D ହ ଷߨ rad v ball O P Q

9 © DHS 2024 8867/01 [Turn over 17 Two identical objects P and Q, rest on a flat rough circular disc. The disc spins about its central axis with increasing rate. When the disc spins at a certain rate, one of the objects slides off the disc. Which statement is correct? A P experiences larger friction than Q. B Q will start to slide first due to its larger distance from the axis. C Q will start to slide first due to its larger angular velocity. D The friction experienced by P and Q are always equal. 18 In the circuit below, three identical resistors of resistance 1.0 kΩ are connected to a cell of 1.2 V with negligible resistance. How many electrons pass through point X in a minute? A 2.5 × 1015 B 1.5 × 1017 C 2.5 × 1018 D 1.5 × 1020

10 © DHS 2024 8867/01 [Turn over 19 Which graph best represents the resistance -temperature characteristics of a negative temperature coefficient thermistor? A B C D 20 The current measured by an ammeter in a circuit is tripled when a 500 Ω resistor is connected in parallel with a resistor with resistance R in the circuit below. Which of the following gives the value of R? A 250 Ω B 500 Ω C 1000 Ω D 1500