GESS 4Exp_Phy_Prelim_P1_24 wo ans

This paper consists of 17 pages including the cover page Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the OTAS in the spaces provided unless this has been done for you. There are forty questions in 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 OTAS. Read the instructions on the OTAS 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. The use of an approved scientific calculator is expected, where appropriate. Total Marks 40

GESS 4EXP PHY P1 Prelim 24 TYL (CHL) 2 1 What is the unit of power expressed in base units? A kg m2 s-2 B kg m2 s-3 C J/s D W 2 What are the orders of magnitude for the diameter of the Earth and for the diameter of an atom? diameter of Earth diameter of atom A B C D 1.3 × 10-6 Gm 1.3 × 10-2 Gm 1.3 × 10-2 Tm 1.3 × 10-6 Tm 1.1 × 10-5 m 1.1 × 10-1 nm 1.1 × 10-5 m 1.1 × 10-1 nm 3 An apple falls from a tree at the top of a tall cliff. As the apple falls, it experiences air resistance. Graphs 1 and 2 are displacement-time graphs. Graphs 3 and 4 are velocity-time graphs. Which graphs describe the motion of the apple? A 1 and 3 B 2 and 3 C 2 and 4 D 1 and 4

GESS 4EXP PHY P1 Prelim 24 TYL (CHL) 3 4 A volleyball player throws a ball vertically upwards as he prepares to hit the ball as shown. Air resistance can be ignored. What is the acceleration of the ball just after it leaves his hand and at its highest point? acceleration just after leaving hand acceleration at its highest point A B C D 10 m/s2 downwards 10 m/s2 downwards 10 m/s2 upwards 10 m/s2 upwards 0 10 m/s2 downwards 0 10 m/s2 downwards 5 At lift off, the mass of a Falcon 9 rocket is 549 000 kg. The rocket engine produces a thrust of 7.6 MN. The gravitational field strength g is 10 N/kg. What is the initial acceleration of the rocket? A 13 m/s2 B 3.8 m/s2 C 2.4 m/s2 D 1.4 m/s2 6 A spacecraft travels from the Earth to the Moon. At a certain point in the journey, it has zero weight. Why is the weight zero at this point? A The gravitational fields of the Earth and of the Moon cancel each other. B C The spacecraft stops moving. D There is no air resistance on the spacecraft.

GESS 4EXP PHY P1 Prelim 24 TYL (CHL) 4 7 A pentagon card is freely suspended from point P. The weight of the card is 2.0 N and the centre of gravity is at C. The card is displaced to the position shown. What is the moment that will cause the card to swing? A 0.60 N m clockwise B 0.80 N m anticlockwise C 1.0 N m anticlockwise D 1.0 N m clockwise 8 The diagram shows four containers made from thin glass. Which empty container is the least stable? 9 To determine the density of