top of page


2016 PPP1Q3 Initial acceleration and terminal velocity of heavier object
Answer: Option C View the video for explanation
Evan Toh
Nov 3, 20251 min read


2016PPP1Q5 Camera in space station orbiting the Earth
Answer: Option A Many have the misconception that as the astronaut and camera are floating and weightless, there is no gravitational force acting on them. Actually both are inside the gravitational field of the Earth, and there is gravitational field strength, hence there is gravitational force acting on them towards the Earth. But as together with the station, they are all ‘free falling’, hence no normal contact force on the astronaut and camera, hence give the feeling of we
Evan Toh
Nov 3, 20251 min read


Circuit Breaker - Analyse the diagram to understand how it operates 2022PPp2q10 and 2024PPp2q11
The diagram of circuit breaker may vary. So it is important that you analyse the structure of the circuit breaker in the diagram to understand how it works. The following are two examples of circuit breaker where the structures are different, but the basic working principles are the same. Video explanation part 01: 2022PPp2q10 2022PPp2q10 Suggested answers: Video explanation part 02: 2024PPp2q11 2024PPp2q11 Suggested answers:
Evan Toh
Oct 27, 20251 min read


What is the numerical value of ratio of c/C?PP2020P1Q20
C is the heat capacity of a body. It is the amount of internal energy transferred to a body per unit change in temperature. (Or for 1...
Evan Toh
Sep 8, 20251 min read


SP2017P1Q8 What is the minimum speed the golf ball must have at X to reach Y?
Answer: Option D The most common mistake is to equate total energy at X equals to total energy at Y. At Y, there is no way to know the...
Evan Toh
Aug 11, 20251 min read


What is the terminal velocity from the height-time graph of a falling object 2017PPp1q3 and 2020PPp1q5
Though the graph is a height-time graph, it is similar to a distance-time graph. Questions: 2017PPp1q3 and 2020PPp1q5 Answer: Option D
Evan Toh
Mar 19, 20251 min read


2024PPp1q6 Ball falling with inital velocity greater than terminal velocity
Instead of the usual ball release from rest, this question states that the ball has an initial velocity greater than terminal velocity in...
Evan Toh
Mar 18, 20251 min read


Video 03 - Finding resultant velocity on boat or plane with wind (updated)
Instead of the usual vector diagram involving forces, these questions involve speed in a specific direction, which is velocity. Velocity ...
Evan Toh
Mar 14, 20251 min read


2023SPp1q3 What is the air resistance when the speed is doubled?
This question is challenging to students as there are many information given. But it is actually quite straight forward when you save one...
Evan Toh
Mar 9, 20251 min read


Which scale diagram shows a resultant of 4 N? 2015PPp1q3
Answer: Option B Similar questions https://www.sgphysicstuition.com/post/video-01-how-to-find-resultant-force-of-two-or-three-forces-with...
Evan Toh
Feb 2, 20251 min read


Orders of magnitude of sizes of atom, hair and Earth
In the syllabus, we are required to understand the orders of magntiude of various objects. Though we may no need to memorise the exact...
Evan Toh
Jan 10, 20251 min read


Evan Toh
Dec 13, 20240 min read


Evan Toh
Dec 13, 20240 min read


2024 SciPhysics 5086 P5 Practical - Electricity
Finding the resistance of unknown resistor R
Evan Toh
Nov 26, 20241 min read


Radioactivity - Questions on Penetrating Ability and Applications
2002PPQ38, 2003PPQ38, 2005PPQ37, 2006PPQ38, 2007PPQ39 Answer: Option B Answer: Option D Answer: Option B Answer: Option C Answer: Option...
Evan Toh
Nov 7, 20241 min read


Radioactivity - Questions on mass number and proton number of the nucleus after decay
2005SPQ20, 2006PPQ40, 2005PPQ38, 2003PPQ39 Answer: Option A Answer: Option D Answer: Option B Answer: Option C Answer: Option B Answer:...
Evan Toh
Nov 7, 20241 min read


Radioactivity - Questions on emissions through electric and magnetic field
Alpha particle is a helium nucleus which is positive charged . Beta particle is an electron which is negative charged . Gamma ray has...
Evan Toh
Nov 6, 20241 min read


Evan Toh
Nov 6, 20240 min read


Copper spheres P and Q, P has larger volume. What quantity is the same? 2020PP01q7
This question is very straight forward. As both P and Q are copper, the density will be the same. But many are unsure of KE. Let look at...
Evan Toh
Nov 4, 20241 min read


What happens to frequency and speed of water wave as it goes to shallow region? 2019PPp1q23
Once the wave is produced, the frequency remains constant. Hence speed V of the wave is directly proportional to the wavelength of the...
Evan Toh
Nov 4, 20241 min read
bottom of page
.png)