devozeeba (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
A and B are two small spheres separated by a distance of 0,70 m. Sphere A carries a charge of +1,5 x 10-6 C and sphere B carries a charge of -2,0 x 10-6 C. P is a point between spheres A and B and is 0,40 m from sphere A, as shown in the … Read more
(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
Two small spheres, X and Y, carrying charges of +6 x 10-6 C and +8 x 10-6 C respectively, are placed 0,20 m apart in air. 7.1 State Coulomb’s law in words. (2) 7.2 Calculate the magnitude of the electrostatic force experienced by charged sphere X. (4) A third sphere, Z, of unknown negative charge, … Read more
(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
(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
A police car moving at a constant velocity with its siren on, passes a stationary listener. The graph below shows the changes in the frequency of the sound of the siren detected by the listener. 6.1 State the Doppler Effect in words. (2) 6.2 Write down the frequency of the sound detected by the listener … Read more
In the diagram below, a 4 kg block lying on a rough horizontal surface is connected to a 6 kg block by a light inextensible string passing over a light frictionless pulley. Initially the blocks are HELD AT REST. 5.1 State the work-energy theorem in words. (2) When the blocks are released, the 6 kg … Read more
MULTIPLE-CHOICE QUESTIONS Various options are provided as possible answers to the following questions. Write down the question number (1.1–1.10), choose the answer and make a cross (X) over the letter (A–D) of your choice in the ANSWER BOOK. EXAMPLE: 1.1 The tendency of an object to remain at rest or to continue in its uniform … Read more
A 2 kg block is at rest on a smooth, frictionless, horizontal table. The length of theblock is x. A bullet of mass 0,015 kg, travelling east at 400 m∙s-1, strikes the block and passes straight through it with constant acceleration. Refer to the diagram below. Ignore any loss of mass of the bullet and … Read more