EJC Physics 2022 J2 H1 MYE P1 Qn

©EJC 2022 8867/01/J2H2MYE/2022 [Turn over EUNOIA JUNIOR COLLEGE JC2 Mid Year Examination 2022 General Certificate of Education Advanced Level Higher 1 CANDIDATE NAME CIVICS GROUP 2 1 - REGISTRATION NUMBER PHYSICS Paper 1 Multiple Choice Questions 8867/01 July 2022 1 hour Candidates answer on the Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write your name, civics group and registration number on all the work you hand in. Do not use paper clips, highlighters, glue or correction fluid. Answer all questions. The use of an approved scientific calculator is expected where appropriate. Multiple Choice Write in soft pencil. 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. This document consists of 15 printed pages and 1 blank page.

2 ©EJC 2022 8867/01/J2H1MYE/2022 Data Formulae uniformly accelerated motion = + ++ = + = + + =   2 22 12 12 1 2 2 11 1 s at u as R /R /R u v /R t RR resistors in series resistors in parallel speed of light in free space − − − − − − −− − × × = × × × = × = = = × = = = 81 19 27 31 e 27 p 23 1 A 11 2 2 2 3 00 1 60 9 11 1 10 m s 10 C 1 66 10 kg 10 kg 10 kg 6 02 10 mol 10 N m k 6 1 g m 7 s 7 66 98 c u . e. . . N G. g . m m . . elementary charge unified atomic mass constant rest mass of electron rest mass of proton the Avogadro constant gravitational constant acceleration of free fall

3 ©EJC 2022 8867/01/J2H1MYE/2022 [Turn over 1 A student attempts to find the density 𝜌𝜌 of aluminium by taking measurements of a rectangular sheet. mass m = 51.6 ± 0.1 g length l = 100.0 ± 0.1 cm width w = 10.0 ± 0.1 cm thickness t = 0.20 ± 0.01 mm He uses the equation 𝜌𝜌 = 𝑚𝑚 𝑤𝑤𝑤𝑤𝑤𝑤 to calculate the density. What is the calculated value of density with its uncertainty? A 0.26 ± 0.01 g cm–3 B 0.26 ± 0.02 g cm–3 C 2.6 ± 0.1 g cm–3 D 2.6 ± 0.2 g cm–3 2 The speed 𝑣𝑣 of a liquid leaving a tube depends on the change in pressure ΔP and the density ρ of the liquid. The speed is given by the equation 𝑣𝑣 = 𝑘𝑘 �∆𝑃𝑃 𝜌𝜌 � 𝑛𝑛 where k is a constant that has no units. What is the value of n ? A 1 2 B 1 C 3 2 D 2 3 A steel rule can be read to the nearest millimeter. It is used to measure the length of a bar whose true length is 895 mm. Repeated measurements give the following readings: Length/mm 892, 891, 892, 891, 891, 892 Are the readings accurate and precise to within 1 mm? Results are accurate to within 1 mm Results are precise to within 1 mm A No No B Yes No C No Yes D Yes Yes

4 ©EJC 2022 8867/01/J2H1MYE/2022 4 A baseball catcher throws a ball vertically upward and catches it in the same spot when it returns to his mitt. At what point in the ball’s path does it experience zero velocity and non- zero acceleration at the same time? A Midway on the way up B At the top of the trajectory C The instant it leaves the catcher’s hand D The instant before it arrives in the catcher’s mitt 5 A ball is projected horizontally off a table an initial velocity u . It eventually hits the floor in a direction 30º below the horizontal with a velocity ν. What is the relationship between u and ν? A cos30 uv= ° B cos30vu= ° C sin 30 uv= ° D sin 30vu= °

5 ©EJC 2022 8867/01/J2H1MYE/2022 [Turn over 6 A driver decelerates uniformly to a stop as he approaches a junction, turns around suddenly, and accelerates at the same rate that he decelerated earlier. Which of the following velocity- time and acceleration-time graphs best represents this motion? A B C D v / m s-1 t / s a / m s -2 t / s v / m s-1 t / s a / m s -2 t / s v / m s-1 t / s a / m s -2 t / s v / m s-1 t / s a / m s -2 t / s

6 ©EJC 2022 8867/01/J2H1MYE/2022 7 A cannon ball is fired at a speed of 450 m s-1 at sea level at an angle of θ = 31.6o with respect to horizontal. The cannon ball hits the top of a watchtower located 900 m away as shown in figure. How high is the top of the watchtower above sea level? Neglect air resistance. 8 The graph shows the variation with time t of a force F acting on a 2.0 kg mass. What is the change in momentum in the body during this period of 10 s? A 50 N s B 75 N s C 90 N s D 100 N s 9 Mass M has the same kinetic energy as mass m. The ratio of their momenta m M p p is 10 An elastic ball is dropped from a height. It comes to a momentary stop when it hits the ground and its compression is at a maximum. Which of the following statements best explains its resultant force at this instant? A Its resultant force is zero because it is momentarily at rest. B Its resultant force is zero because at maximum compression, the force from the ground is exactly equal to its weight. C Its resultant force is upwards because it is experiencing an upward acceleration. D Its resultant force is downwards because the rubber ball is pushing the ground with a force greater than its weight due to its compressed state. A 527 m B 542 m C 580 m D 1390 m A M m M+ B m M M + C m M D M m θ u = 450 m s-1 Watchtower 900 m sea level force F / N time t / s 0 2 4 6 8 10 10

7 ©EJC 2022 8867/01/J2H1MYE/2022 [Turn over 11 Two balls X and Y approach each other along the same straight line and collide elastically. Their speeds are ux and uy respectively. After the collision they move apart with speeds vx and vy respectively. Their directions are shown on the diagram. Which of the following equation is correct? A ux - uy = vy - vx B ux + uy = vx - vy C ux + uy = vx + vy D ux - uy = vx - vy 12 A cyclist who needs to accelerate quickly would get off the seat and pedal while standing. In this situation, the resultant force accelerating the bicycle is A the weight of the cyclist B the force the cyclist exerts on the pedal C the frictional force on the wheels by the ground D the contact force the wheels exert on the ground 13 A hard sphere is rolling with constant speed along a straight line on a hard horizontal surface as shown. Neglecting air drag, which diagram best represents the force exerted by the surface on the sphere?

8 ©EJC 2022 8867/01/J2H1MYE/2022 14 A non-uniform rod of mass 4.0 kg is suspended by a string attached at B and is hinged at A so that it is horizontal. The centre of gravity of the rod is 60 cm from A and 40 cm from B. The string makes an angle 30o with the vertical as shown. What is the mass M? A 2.8 kg B 14.5 kg C 18.8 kg D 27.2 kg 15 A uniform rod XY is freely hinged to the wall at X. It is held horizontal by a force F acting on Y at an angle θ to the vertical as shown in the diagram. Which arrow shows the direction of the reaction force exerted by the wall on the rod? 16 A pump lifts 200 kg of water per minute through a vertical height of 15 m. What is the input power rating of the pump if it is 65% efficient? A 19 kW B 45 kW C 320 W D 750 W 17 A lorry of mass 2000 kg has an engine which can deliver a maximum power of 50 kW. What is the minimum time in which the lorry can be accelerated from