Directorate: Curriculum FET
PHYSICAL SCIENCES
REVISION BOOKLET
2021 TERM 1
Grade 11
This revision program is designed to assist you in revising the critical
content and skills covered during the 1st term. The purpose is to
prepare you to understand the key concepts and to provide you with
an opportunity to establish the required standard and the application
of the knowledge necessary to succeed in the NCS examination.
, 2
The revision program covers the following topics:
1. Forces and Newton’s Laws of Motion. Pg. 2 – 8
• Questions 1 - 5 Pg. 3 – 8
2. Forces and Newton’s Law of Universal Gravisitation. Pg. 8 – 9
• Questions 6.1 – 6.2
3. Atomic combinations, Molecular structures and
Intermolecular forces. Pg. 9 – 13
Introduction Pg. 9
• Questions 7 - 10
Pg. 10 – 13
Nasienriglyne: Fisika Pg. 14 – 25
Chemie Pg. 26 – 29
Newton's laws and application thereof.
• The normal force, N, is the force or the component of a force which a surface exerts
on an object with which it is in contact, and which is perpendicular to the surface.
• The frictional force, f, is the force that opposes the motion of an object and which
acts parallel to the surface.
• The static frictional force, fs, is the force that opposes the tendency of motion of a
stationary object relative to a surface.
• Define kinetic frictional force, fk, as the force that opposes the motion of a moving
object relative to a surface.
• Newton's first law of motion: A body will remain in its state of rest or motion at
constant velocity unless a non-zero resultant/net force acts on it.
• Newton's second law of motion: When a resultant/net force acts on an object, the
object will accelerate in the direction of the force at an acceleration directly
proportional to the force and inversely proportional to the mass of the object.
• Newton's third law of motion: When one body exerts a force on a second body, the
second body exerts a force of equal magnitude in the opposite direction on the first
body.
Read and learn the above statements and laws which underpin this section on
Newton’s laws. Do only the first question and verify your answers and method with the
marking guidelines at the end of the document.
, 3
QUESTION 1
Block A, which is at rest on a horizontal rough surface, is used as an anchor
to hold block B, with a mass of 56 kg, in the air at a certain height above the
ground. The two blocks are connected with rope R, which makes an angle of
35° with the vertical. Block B is suspended from the ceiling with cable C.
Refer to the diagram below.
θ
C A
35 °
R
56 kg B
Block A experiences a frictional force of magnitude 200 N. The system is stationary.
1.1.1 Define the term resultant vector. (2)
1.1.2 What is the magnitude of the resultant force acting on block B? (1)
1.1.3 Draw a labelled free-body diagram indicating all the forces acting on (3)
block B.
1.1.4 Determine the horizontal component of the force in rope R. (1)
1.1.5 Calculate the vertical component of the force in cable C. (4)
1.1.6 Calculate the angle θ between the cable and the ceiling. (2)
[13]
PHYSICAL SCIENCES
REVISION BOOKLET
2021 TERM 1
Grade 11
This revision program is designed to assist you in revising the critical
content and skills covered during the 1st term. The purpose is to
prepare you to understand the key concepts and to provide you with
an opportunity to establish the required standard and the application
of the knowledge necessary to succeed in the NCS examination.
, 2
The revision program covers the following topics:
1. Forces and Newton’s Laws of Motion. Pg. 2 – 8
• Questions 1 - 5 Pg. 3 – 8
2. Forces and Newton’s Law of Universal Gravisitation. Pg. 8 – 9
• Questions 6.1 – 6.2
3. Atomic combinations, Molecular structures and
Intermolecular forces. Pg. 9 – 13
Introduction Pg. 9
• Questions 7 - 10
Pg. 10 – 13
Nasienriglyne: Fisika Pg. 14 – 25
Chemie Pg. 26 – 29
Newton's laws and application thereof.
• The normal force, N, is the force or the component of a force which a surface exerts
on an object with which it is in contact, and which is perpendicular to the surface.
• The frictional force, f, is the force that opposes the motion of an object and which
acts parallel to the surface.
• The static frictional force, fs, is the force that opposes the tendency of motion of a
stationary object relative to a surface.
• Define kinetic frictional force, fk, as the force that opposes the motion of a moving
object relative to a surface.
• Newton's first law of motion: A body will remain in its state of rest or motion at
constant velocity unless a non-zero resultant/net force acts on it.
• Newton's second law of motion: When a resultant/net force acts on an object, the
object will accelerate in the direction of the force at an acceleration directly
proportional to the force and inversely proportional to the mass of the object.
• Newton's third law of motion: When one body exerts a force on a second body, the
second body exerts a force of equal magnitude in the opposite direction on the first
body.
Read and learn the above statements and laws which underpin this section on
Newton’s laws. Do only the first question and verify your answers and method with the
marking guidelines at the end of the document.
, 3
QUESTION 1
Block A, which is at rest on a horizontal rough surface, is used as an anchor
to hold block B, with a mass of 56 kg, in the air at a certain height above the
ground. The two blocks are connected with rope R, which makes an angle of
35° with the vertical. Block B is suspended from the ceiling with cable C.
Refer to the diagram below.
θ
C A
35 °
R
56 kg B
Block A experiences a frictional force of magnitude 200 N. The system is stationary.
1.1.1 Define the term resultant vector. (2)
1.1.2 What is the magnitude of the resultant force acting on block B? (1)
1.1.3 Draw a labelled free-body diagram indicating all the forces acting on (3)
block B.
1.1.4 Determine the horizontal component of the force in rope R. (1)
1.1.5 Calculate the vertical component of the force in cable C. (4)
1.1.6 Calculate the angle θ between the cable and the ceiling. (2)
[13]
