## Formula Sheet

DATA FOR PHYSICAL SCIENCES GRADE 12PAPER 1 (PHYSICS) GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 12VRAESTEL 1 (FISIKA) TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES TABLE 2: FORMULAE/TABEL 2: FORMULESMOTION/BEWEGING FORCE/KRAG WORK, ENERGY AND POWER/ARBEID, ENERGIE EN DRYWING WAVES, SOUND AND LIGHT/GOLWE, KLANK EN LIG ELECTROSTATICS/ELEKTROSTATIKA ALTERNATING CURRENT/WISSELSTROOM

## Question 10

(Start on a new page.) 10.1 A learner is investigating the photoelectric effect for two different metals, silver and sodium, using light of different frequencies. The maximum kinetic energy of the emitted photoelectrons is plotted against the frequency of the light for each of the metals, as shown in the graphs below. 10.1.1 Define the … Read more

## Question 9

(Start on a new page.) 9.1 A generator is shown below. Assume that the coil is in a vertical position. 9.1.1 Is the generator above AC or DC? Give a reason for the answer. (2) 9.1.2 Sketch an induced emf versus time graph for ONE complete rotation of the coil. (The coil starts turning from … Read more

## Question 8

(Start on a new page.) 8.1 In the circuit below the battery has an emf (ε) of 12 V and an internal resistance of 0,2 Ω. The resistances of the connecting wires are negligible. 8.1.1 Define the term emf of a battery. (2) 8.1.2 Switch S is open. A high-resistance voltmeter is connected across points … Read more

## Question 7

(Start on a new page.) 7.1 In an experiment to verify the relationship between the electrostatic force, FE, and distance, r, between two identical, positively charged spheres, the graph below was obtained. 7.1.1 State Coulomb’s law in words. (2) 7.1.2 Write down the dependent variable of the experiment. (1) 7.1.3 What relationship between the electrostatic … Read more

## Question 6

(Start on a new page.) 6.1 An ambulance is moving towards a stationary listener at a constant speed of 30 m∙s-1. The siren of the ambulance emits sound waves having a wavelength of 0,28 m. Take the speed of sound in air as 340 m∙s-1. 6.1.1 State the Doppler effect in words. (2) 6.1.2 Calculate … Read more

## Question 5

(Start on a new page.) A pendulum with a bob of mass 5 kg is held stationary at a height h metres above the ground. When released, it collides with a block of mass 2 kg which is stationary at point A. The bob swings past A and comes to rest momentarily at a position … Read more

## Question 4

(Start on a new page.) The graph below shows how the momentum of car A changes with time just before and just after a head-on collision with car B. Car A has a mass of 1 500 kg, while the mass of car B is 900 kg.Car B was travelling at a constant velocity of … Read more

## Question 3

(Start on a new page.) A ball is dropped from the top of a building 20 m high. Ignore the effects of air resistance. 3.1 Define the term free fall. (2) 3.2 Calculate the: 3.2.1 Speed at which the ball hits the ground (4) 3.2.2 Time it takes the ball to reach the ground (3) … Read more

## Question 2

(Start on a new page.) A learner constructs a push toy using two blocks with masses 1,5 kg and 3 kg respectively. The blocks are connected by a massless, inextensible cord. The learner then applies a force of 25 N at an angle of 30o to the 1,5 kg block by means of a light … Read more