Physical Sciences Grade 12 Paper 1 KZN March 2020 Memo

Downloaded from hlayiso.com education Department: Education PROVINCE OF KWAZULU-NATAL { GRADE 12 | NATIONAL SENIOR CERTIFICATE t PHYSICAL SCIENCES P1 (PHYSICS) " r COMMON TEST " “ MARCH 2020 i MARKS : 50 TIME : 1 hour This question paper consists of 6 pages and 1 data sheet. | Copyrigth reserved Please turn over = — — M2

Downloaded from hlayiso.com Physical Science P1 2 March 2020 Common Test NSC INSTRUCTIONS AND INFORMATION TO CANDIDATES 10. de a2: Write your name on the ANSWER BOOK. This question paper consists of FOUR questions. Answer ALL the questions in the ANSWER BOOK. Start EACH question on a NEW page in the ANSWER BOOK. Number the answers correctly according to the numbering system used in this question paper. Leave ONE line between two sub questions, for example between QUESTION 2.1 and QUESTION 2.2. You may use a non-programmable calculator. You may use appropriate mathematical instruments. You are advised to use the attached DATA SHEET. Show ALL formulae and substitutions in ALL calculations. Round off your final numerical answers to a minimum of TWO decimal places. Give brief motivations, discussions, et cetera where required. Write neatly and legibly. Copyrigth reserved Please turn over M2

Downloaded from hlayiso.com Physical Science P1 3 March 2020 Common Test NSC QUESTION 1: MULTIPLE-CHOICE QUESTIONS Four options are provided as possible answers to the following questions. Each question has only ONE correct answer. Write only the letter (A — D) next to the question number (1.1 — 1.4) in the ANSWER BOOK, for example 1.5 C. 1.1 Her 1.3 1.4 If the net force acting on a object is ZERO, the object will ... A experience a constant increase in velocity. B accelerate in the direction of the largest force. Cc move at constant velocity or remain at rest. D experience a constant decrease in velocity. If the radius of the Earth were to shrink (become smaller) and its mass were to remain the same, the acceleration due to gravity on the surface of the Earth would ... A. increase B. decrease Cc. remain the same D. be reduced to zero A car of mass M, traveling at a speed v, stops in a time t when a maximum braking force is applied. If the same braking force is now applied to stop a car of mass 2M traveling at speed v, the time taken to achieve this will be... A Yat B t G \2t D 2t A ball is released from rest from a certain height above the floor and bounces off the floor a number of times. The position-time graph below represents the motion of the bouncing ball from the instant it is released. E ci 2 = D a {-} o o time (s) Neglecting air resistance, which point (A, B, C or D) on the graph represents the position-time coordinates for the moment the ball hits the ground for the SECOND time? VOW>Y o0ND> (2) 2x4 =[8] Copyrigth reserved Please turn over M2 (2)

Downloaded from hlayiso.com Physical Science P1 4 March 2020 Common Test NSC QUESTION 2 The diagram below, not drawn to scale shows a van, mass 2100 kg, pulling a trailer of mass 1250 kg up a tar road that is inclined at 30° to the horizontal. The van a driving force of 30900 N. The coefficient of kinetic friction for the road and the vehicles is 0,3. 24 State Newton’s Second Law in words. (2) In answering the following questions, ignore the rotational motion of the wheels of the van and trailer and the mass of the towbar. 2.2 Draw a labelled free body diagram for the trailer as it moves. (4) 2.3 Calculate the acceleration of the van by applying Newton’s Second Law of Motion SEPARATELY to the trailer and the van. (6) 2.4 How will the acceleration of the van be affected if the towbar were to break? (Choose from: INCREASES, DECREASES or REMAINS THE SAME) Give a reason. (2) [14] Copyrigth reserved Please turn over M2

Downloaded from hlayiso.com Physical Science P1 5 March 2020 Common Test NSC QUESTION 3 The diagram below shows two sections, PQ and QR, of a horizontal, flat surface. Section PQ is SMOOTH, while section QR is ROUGH. A5,5 kg block, moving with a velocity of 4,5 m-s"! to the right, collides head-on with a stationary 3,5 kg block. After the collision the two blocks stick together and move to the right past point Q. The combined blocks travel for 0,6 s from point Q before coming to a stop at point R. 4,5 mes 0 mes* ES P Q R 3.1. State the Law of conservation of momentum in words (2) 3.2 Calculate the magnitude of the velocity of the combined blocks at point Q. (4) 3.3. Use acalculation to prove that the collision between the two blocks is inelastic (4) 3.4 Calculate the magnitude of the net force acting on the combined blocks when they move through section QR. (4) [14] Copyrigth reserved Please turn over M2

Downloaded from hlayiso.com Physical Science P1 6 March 2020 Common Test NSC QUESTION 4 A tennis ball is thrown vertically upwards from a window that is 8m above the ground. The ball takes 0,8 s to reach its maximum height, after which it lands on the ground below. The graph below, not drawn to scale, represents the motion of the ball. Ignore air resistance ts E c 7 O °o [i -8 4.1 Calculate: 4.1.1 The initial velocity of the ball. (3) 4.1.2. The maximum height above the ground that the ball reaches (4) 4.1.3 The time for the entire motion of the ball. (3) 4.2 Sketch a velocity - time graph for the entire motion of the ball. In the sketch indicate the following: e Initial velocity of the ball e Time to reach maximum height e Time for the entire motion of the ball (4) [14] TOTAL: 50 Copyrigth reserved Please turn over M2

Downloaded from hlayiso.com Physical Science P1 7 NSC March 2020 Common Test DATA FOR PHYSICAL SCIENCES (PHYSICS) GRADE 12 GEGEWENS VIR FISIESE WETENSKAPPE (FISIKA) GRAAD 12 TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES NAME/NAAM SYMBOL/SIMBOOL VALUE/WAARDE Acceleration due to gravity 2 Swaartekragversnelling g 9,8 ms Universal gravitational constant e 6,67 x 1071 N.m2.kg2 TABLE 2: FORMULAE/TABEL 2: FORMULES MOTION/BEWEGING Ve =Vi t+ aAt Ax =v,At+ tat? or/of Ay =v,At+taat? vy? = v2 +2adx orlof v,? =v,’ +2aAy AX = (“) At or/ofAy = (“at 1 K=E, =~mv? 2 FORCE/KRAG Fret =ma p=mv Fp At =Ap=mv ~My; Fy =mg Fe Gm.m, r £7 =y,N f, = uN Copyrigth reserved M2

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