Various options are provided as possible answers to the following questions - NSC Physical Sciences - Question 1 - 2016 - Paper 1
Question 1
Various options are provided as possible answers to the following questions. Write down the question number (1.1–1.10), choose the answer and make a cross (X) over t... show full transcript
Worked Solution & Example Answer:Various options are provided as possible answers to the following questions - NSC Physical Sciences - Question 1 - 2016 - Paper 1
Step 1
1.1 The tendency of an object to remain at rest or to continue in its uniform motion in a straight line is known as …
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is B, inertia. Inertia is the property of an object that resists changes to its state of motion.
Step 2
1.2 The mass of an astronaut on Earth is M. At a height equal to twice the radius of the Earth, the mass of the astronaut will be …
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is B, M. The mass of an object is independent of its position, including altitude.
Step 3
1.3 An object is thrown vertically upwards from the ground.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is B. The acceleration of the object is upwards when it moves up and downwards when it is coming down, due to gravitational force.
Step 4
1.4 A person drops a glass bottle onto a concrete floor from a certain height...
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is D. The second bottle experiences a larger time of contact with the carpet, resulting in less force applied to it compared to the first bottle on concrete.
Step 5
1.5 A block of mass m is released from rest from the top of a frictionless inclined plane QR...
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is D. The total mechanical energy remains constant, thus E_Q = E_R, and kinetic energy K_R is greater as the block descends the incline.
Step 6
1.6 The diagram below shows the positions of two stationary listeners, P and Q...
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is B. Listener P will hear a higher frequency because the sound waves are compressed due to the Doppler effect, while listener Q will hear a higher frequency as well.
Step 7
1.7 Two charges, +Q and -Q, are placed a distance d from a negative charge -q...
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer will depend on the diagrams provided, as the direction of the net force acting on charge -q would be dictated by the arrangement of charges.
Step 8
1.8 Learners investigate the relationship between current (I) and potential difference (V)...
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is C. The graphs indicate the resistances, showing R_X > R_Y > R_Z.
Step 9
1.9 Which ONE of the following changes may lead to an increase in the emf of an AC generator without changing its frequency?
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is B. Increasing the area of the coil will lead to a higher emf while keeping the frequency constant.
Step 10
1.10 The wavelength of a monochromatic light source P is twice that of a monochromatic light source Q...
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is A. The energy of a photon is inversely proportional to its wavelength, thus a wavelength twice as long means a photon energy that is a quarter in comparison.
