GRADE 11 PHYSICAL SCIENCES: PHYSICS (P1) HALF YEARLY ...

NATIONAL SENIOR CERTIFICATE

GRADE 11

PHYSICAL SCIENCES: PHYSICS (P1) HALF YEARLY EXAMINATION

3RD JUNE 2014

READINESS TEST 2011

MARKS :

150

TIME

:

3 Hours

This question paper consists of (13) pages including this cover page, a graph sheet and a data sheet.

INSTRUCTIONS AND INFORMATION

1 Answer all questions.

2 Non-programmable calculators may be used.

3 Appropriate mathematical instruments may be used.

4 Number the answers correctly according to the numbering system used in this question paper.

5 Be brief whenever motivations, discussions, et cetera, are required

6 Where needed, data sheets and graph papers will be provided by the school.

7 Leave ONE line between two sub-questions, for example between QUESTION 3.1 and QUESTION 3.2.

8 Show the formulae and substitutions in ALL calculations.

9 Round off your final answer to two (2) decimal places, unless otherwise stated.

QUESTION 1

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 ? 1.10) in the ANSWER BOOK.

1.1 Which of the following pairs can be classified as vectors?

A. Friction and mass

B. Mass and inertia

C. Inertia and weight

D. Weight and friction

(2)

1.2 Which one of the following represents a closed vector diagram?

A Page 2 of 13

B

C

D

(2)

Physical Sciences

Grade 11 Paper 1 June 2014

1.3 A brick slides on a rough horizontal surface. Which ONE of the following actions will increase the frictional force acting on the brick?

A. Decreasing the surface area of contact

B. Increasing the surface area of contact

C. Putting a second brick on it

D. Decreasing the mass of the brick

(2)

1.4 The graphs below show the relationship between the net force and the acceleration for two masses X and Y.

X

a

Y

F Which one of the following statements is true?

A. The bodies have equal masses.

B. Body X has a smaller mass.

C. Body Y has a smaller mass.

D. The mass does not affect the gradient of the graphs.

(2)

1.5 Consider a man pressing a book against a wall with a force F as shown in the sketch below.

F

The reaction force to force F will be:

A. The force with which the wall presses on the book

B. The force with which the book presses on the wall

C. The force with which the book presses on the man

D. The frictional force between the book and the wall

(2)

Page 3 of 13

Physical Sciences

Grade 11 Paper 1 June 2014

1.6 A wave passes from a medium of high optical density to one of low optical density.

Which ONE of the following is correct?

A The frequency of the wave remains constant.

B The speed of the wave remains constant.

C The frequency of the wave increases.

D The frequency of the wave decreases.

(2)

1.7 An artificial satellite circles around the earth at a height where the gravitational force is a ? of that at the surface of the earth. If the earth's radius is R, the height of the satellite above the surface of the earth is

A. 2R

B. R

C. ? R

D. ? R

(2)

1.8 Which ONE of the following properties demonstrates the wave nature of light?

A. Light can be refracted. B. Light travels at a speed of 3 x 108 m.s-1

C. White light can be separated into a number of different colours

D. Light is diffracted after passing through a narrow slit.

(2)

1.9 The ability of a wave to spread out in wave fronts as they pass through a small opening is known as

A. Refraction

B. Interference

C. Reflection

D. Diffraction

(2)

Page 4 of 13

Physical Sciences

Grade 11 Paper 1 June 2014

1.10 A ray of light strikes a rectangular Perspex block so that the angle between the ray and the side of the block is 40? as shown in the diagram

40?

Which ONE of the statements below is correct?

A. angle of incidence is 50? B. ray is bent towards the normal C. ray undergoes dispersion D. angle of refraction is 50?

(2) TOTAL [20]

QUESTION 2 The diagram below shows three forces of 5 N, 4 N and 3 N acting on an object in the same Cartesian plane.

y 5 N

Calculate the:

3 N

45?

x

4 N

2.1 Magnitude of the resultant force acting on the object.

2.2 Direction of the resultant force.

(10) (3)

[13]

Page 5 of 13

Physical Sciences

Grade 11 Paper 1 June 2014

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