Podcast
Questions and Answers
Which quantity reflects an object's resistance to changes in its motion?
Which quantity reflects an object's resistance to changes in its motion?
- Acceleration
- Impulse
- Momentum
- Inertia (correct)
On a velocity-time graph of a bouncing ball, what point signifies the ball reaching its maximum height after the first upward bounce?
On a velocity-time graph of a bouncing ball, what point signifies the ball reaching its maximum height after the first upward bounce?
- S
- R (correct)
- Q
- P
Two blocks (P and Q) are at rest with a compressed spring between them. After release, block Q moves right with velocity v. What represents the momentum of block P?
Two blocks (P and Q) are at rest with a compressed spring between them. After release, block Q moves right with velocity v. What represents the momentum of block P?
- $m_2v$ to the left (correct)
- $m_2v$ to the right
- $m_1v$ to the left
- $m_1v$ to the right
If the mass of sphere X doubles while interacting gravitationally with sphere Y, what happens to the gravitational forces?
If the mass of sphere X doubles while interacting gravitationally with sphere Y, what happens to the gravitational forces?
What physical quantity cannot change when a hot-air balloon descends at a constant speed?
What physical quantity cannot change when a hot-air balloon descends at a constant speed?
An ambulance moves at a constant velocity. Which statement is correct regarding sound frequency detected by a roadside learner?
An ambulance moves at a constant velocity. Which statement is correct regarding sound frequency detected by a roadside learner?
Two identical spheres X (+2q) and Y (-6q) exert an electrostatic force F. After contact, what is the electrostatic force that sphere X experiences?
Two identical spheres X (+2q) and Y (-6q) exert an electrostatic force F. After contact, what is the electrostatic force that sphere X experiences?
In a circuit with identical resistors R1, R2, and R3, where R1 dissipates power P, what is the power dissipated by R2?
In a circuit with identical resistors R1, R2, and R3, where R1 dissipates power P, what is the power dissipated by R2?
Which change to a DC motor will change the direction of coil rotation?
Which change to a DC motor will change the direction of coil rotation?
An atom transitions from ground state energy x to higher energy state y. What is the energy change to cause a line spectrum?
An atom transitions from ground state energy x to higher energy state y. What is the energy change to cause a line spectrum?
State Newton's Second Law of Motion in words.
State Newton's Second Law of Motion in words.
Define the term free fall.
Define the term free fall.
The principle of conservation of linear momentum states energy is conserved.
The principle of conservation of linear momentum states energy is conserved.
Define a non-conservative force.
Define a non-conservative force.
State the Doppler effect in words.
State the Doppler effect in words.
State Coulomb's Law in words.
State Coulomb's Law in words.
State Ohm's law in words.
State Ohm's law in words.
According to the photo electric effect, the minimum energy needed to eject an electron from a metal surface is called the ______.
According to the photo electric effect, the minimum energy needed to eject an electron from a metal surface is called the ______.
In an AC generator, reversing the polarity will keep the device running, but will reverse the flow of current.
In an AC generator, reversing the polarity will keep the device running, but will reverse the flow of current.
Losing an electron from an atom of an element means that an amount of energy equal to the ______ has been absorbed.
Losing an electron from an atom of an element means that an amount of energy equal to the ______ has been absorbed.
Flashcards
Inertia
Inertia
The tendency of an object to resist changes in its state of motion.
Newton's Second Law of Motion
Newton's Second Law of Motion
Newton's Second Law states that the net force acting on an object is directly proportional to the rate of change of momentum.
Principle of Conservation of Linear Momentum
Principle of Conservation of Linear Momentum
In a closed system, the total momentum remains constant if no external forces act.
Non-conservative force
Non-conservative force
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Doppler effect
Doppler effect
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Coulomb's law
Coulomb's law
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Work Function
Work Function
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Ohm's law
Ohm's law
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AC Generator
AC Generator
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Free fall
Free fall
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Study Notes
- These are study notes for Physical Sciences: Physics (P1)
- The exam is in 2023
- Total marks: 150
- Time allowed: 3 hours
- The paper consists of 16 pages and 3 data sheets
Instructions
- Write your center number and examination number in the answer book
- The question paper consists of 10 questions to be answered in the answer book
- Start each question on a new page in the answer book
- Number your answers correctly using the numbering system in the paper
- Leave a line between sub-questions
- A non-programmable calculator can be used
- Appropriate mathematical instruments can be used
- Show ALL formulas and substitutions used in calculations
- Round off final numerical answers to a minimum of 2 decimal places
- Give brief motivations/discussions where required
- Use the attached data sheets
- Write neatly and legibly
Multiple Choice
- Each question has only ONE correct answer
- Choose the correct answer and write the correlating letter next to the corresponding question number in the answer book
Mechanics
- Inertia describes how much an object resists changes to its state of motion
- When a ball is dropped from a hieght, at the time it reaches maximum height after the first upward bounce, the point is shown on the graph as 'R
- When 2 blocks are released and spring drops to the floor, block P moves to the left
- When the mass of sphere X is doubled, the gravitational force exerted on Y changes to 2F.
- When the mass of sphere Y is kept the same, the gravitational force exerted on X changes to 2F
- Potential Energy describes the physical quantities associated with the hot-air balloon changes during the motion and the mass of the hot-air balloon remains constant
- When considering the motion of an ambulance, the ambulance approaches the learner and then passes the learner
Electromagnetism
- The electrostatic force experienced by sphere X after the spheres are brought into contact is F/4
- The power dissipated by resistor R2 in the circuit is P/4
- To change the original direction of a DC motor, make the changes (iii) only
- When an atom moves to a higher energy state y, the energy change is y-x and the typo of line spectrum observed is emmision
Vertical Projectile Motion
- Block B has an acceleration of 3,88 m/s2 while moving vertically downwards
- When a ball is in free fall, it accelerates at gravity
- Velocity with which ball B was projected is an unknown value
Momentum
- The principle of conservation of linear momentum states that the total linear momentum of an isolated system remains constant if no external forces act on it
Energy Principles
- Define a non-conservative force: A non-conservative force is one for which the work done in moving an object between two points depends on the path taken
- Energy principles are used to calculate the speed of the crate when it reaches point C
- Rope breaks when crate reaches point C, the crate continues moving up the plain and comes to a stop.
Sound
- Doppler effect defined: a change in sound frequency from the source, caused by a moving source or observer
- The spectral lines observed for a distant star show that the star is moving away from Earth.
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