Gravitational force exists between the sun and the Earth. 5.1 State Newton’s law of Universal Gravitation in words. (2) 5.2 The mass of the sun is 330 000 times greater than that of the Earth. Thedistance between the centres of the sun and the Earth is 1,38 x 109 m.Calculate the gravitational force that the … Read more
4.1 In the diagram below, a 2 kg block is connected to a 1 kg block by means of alight inextensible string. The blocks are pulled up an inclined plane, whichforms an angle of 28o to the horizontal. The sides of the blocks which touchthe inclined plane have the same area. The kinetic frictional force … Read more
Two blocks, of mass 8 kg and 4 kg respectively, are joined with an inelastic string of negligible mass. The string runs over a frictionless pulley. The 8 kg block is on a horizontal surface while the 4 kg block is on an inclined plane of 40° with the horizontal. The coefficient of kinetic friction … Read more
A hovering rescue helicopter has a container of supplies, with a weight of 1 960 N, hanging from a cable. The tension in the cable is 2 100 N. 3.1 State Newton’s First Law of Motion in words. (2) 3.2 Draw a labelled force-diagram of ALL the forces acting on the container. (3) 3.3 Why … Read more
A constant force, F, pulls a 50 kg block at a constant speed over a rough horizontalsurface, AB, as shown in the diagram below. The coefficient of kinetic friction (μk)between the block and the surface is 0,4. 3.1 Draw a labelled free-body diagram showing ALL the forces acting on theblock. (4) 3.2 State Newton’s first … Read more
Three forces, P, Q and R, of magnitudes 500 N, 200 N and 300 N respectively, act ona point O in the directions shown in the diagram below. The forces are NOT drawn to scale. 2.1 Refer to the information in the diagram above and give a reason why forcesP, Q and R are classified … Read more
A heavy object is lifted using two ropes and two pulleys, as shown in the diagram below. The two pulleys are a distance x apart. The force FA, in rope A, is 730 N and the force FB, in rope B, is 1 440 N. Rope A makes an angle of 70° with the horizontal … Read more
Four options are provided as possible answers to the following questions. Eachquestion has only ONE correct answer. Choose the answer and write only theletter (A–D) next to the question number (1.1–1.10) in the ANSWER BOOK, forexample 1.11 E. 1.1 Vector P and vector –P are acting on a common point O. The angle betweenthe two … Read more
9.1 A survey was done among 80 learners on their favourite sport The results are shown below : 52 learners like rugby (R) 42 learners like volleyball(V) 5 learners like chess (C) 14 learners like rugby and volleyball but not chess 12 learners like rugby and chess but not volleyball 15 learners like volleyball and … Read more
8.1 A bag contains 3 blue marbles and 2 red marbles. A marble is taken from the bag the colour is recorded and the marble is put aside. A second marble is taken from the bag the colour is recorded and then put aside 8.1.1 Draw tree diagram to represent the information above. Show the … Read more