PDF Grade 11 Physical Sciences Paper 1 June 2016 Memorandum

1

GRADE 11

PHYSICAL SCIENCES PAPER 1 JUNE 2016

MEMORANDUM

MARKS :

150

READINESS TEST 2011

Note: Check the marking guidelines given in the examination guidelines (pages 33-34) before marking the scripts

QUESTION 1: MULTIPLE CHOICE QUESTIONS

1.1 D

(2)

1.2 C

(2)

1.3 B

(2)

1.4 B

(2)

1.5 A

(2)

1.6 C

(2)

1.7 C

(2)

1.8 A

(2)

1.9 B

(2)

1.10 D

(2)

[20]

QUESTION 2

2.1 T1y = 120 x sin 35

(7)

= 68,8 N

T2y = 100 x sin45

= 70,7 N

T1y + T2y = 68,8 + 70,7

= 139,5 N

Since the forces are in equilibrium, T3 = 139,5 N.

2.2 T2y = T2 x sin 45 + 68,8

(4)

= 150 N

T2 = (150-68,8)/sin 45

= 114,9 N

[11]

QUESTION 3

3.1

N

(3)

fr

30

w

3.2 N = mgcos 30

(4)

= 8 x 9,8 x cos 30

= 67,90 N

3.3 fr = mgsin 30

(4)

= 8 x 9.8 x sin 30

= 39,2 N up the slope.

[11]

QUESTION 4

4.1 Inertia

(1)

4.2 Newton's first law.

(3)

An object will continue in its state of rest or uniform motion in a straight line

unless it is acted upon by an unbalanced force.

Page 2 of 8 Physical Sciences Grade 11 P1 JUNE 2016 MEMO Limpopo Province 13-06-2016

4.3 According to Newton's first law,when a car crashes and stops suddenly its (4) occupants will continue to move with the speed of the car and crashes through the windscreen. Safety belts exert a backward force on the occupants prevent them from crashing through the windscreen and sustain an injury. [8]

QUESTION 5

5.1 To compensate for friction.

(2)

5.2

Page 3 of 8 Physical Sciences Grade 11 P1 JUNE 2016 MEMO Limpopo Province 13-06-2016

5.2

(6)

Criteria to Marking the Graph

Both axes labelled with correct units (1 mark) All three points plotted correctly (3 marks - 1 mark per point) Drawing of graph (best fit curve) (2 marks) Note:Sketch graph given no mark

5.3 Acceleration is inversely proportional to mass,( i.e. a 1/m.)

(2)

5.4 Mass (kg)/ (Number of Trolleys) 1 2 3

1/mass Kg-1

1 0,5 0,33

Acceleration (m.s-2)

0.81

0,41

0,27

(3)

5.5Criteria to Marking the Graph (graph follows)

All three points plotted correctly (3 marks ? 1 mark per point)

Drawing of graph (best fit) (2 marks)

(5.)

Note: Sketch graph given No mark

Page 4 of 8 Physical Sciences Grade 11 P1 JUNE 2016 MEMO Limpopo Province 13-06-2016

acceleration (m.s-2)

1/mass X acceleration graph Scale X-axis 2 cm : 0.2 kg-1 ; Y-axis 2cm : 0.2 m.s-2

1.0

.

0.8

0.6

0.4

.

.

0.2

0

0.2

0.4

0.6

0.8

1

1/mass of trolleys (kg-1) OR 1/Number of trolleys

5.6 Gradient = a ? (1/m) = ma

(2)

5.7 Force accelerating the trolleys/weight of hanging mass .

(1)

[21]

Page 5 of 8 Physical Sciences Grade 11 P1 JUNE 2016 MEMO Limpopo Province 13-06-2016

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