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Object is released and free-falling. Time taken to fall vertically from P to Q?
Keep in mind that you can utilize the two main concepts of a speed-time graph. As object is under free-fall, the acceleration (the...
Evan Toh
Oct 24, 20241 min read
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Evan Toh
Oct 23, 20241 min read
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Displacement-time and Velocity-time Graph of Ball Thrown Up / Ball Dropped
1) When a ball is thrown up and it comes down When the ball leaves the hand, there is no upward force acting on the ball. The only force...
Evan Toh
Oct 23, 20241 min read
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2016PPP1Q40 – Voltage and Power of Bulb Y when X is switched off - 2013PPP1Q40 heaters
2016PPP1Q40 Solutions: Option C [There is another similar question in 2013 Nov Pure Physics P1Q40. The answer is Option C too. Refer to...
Evan Toh
Oct 22, 20241 min read
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Using P = I^2R and P = V^2/R to explain which component uses the highest power or energy.
Instead of P = IV to explain, it might be easier to explain using P = I^2R when the components are connected in series where current I is...
Evan Toh
Oct 21, 20241 min read
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When a thermistor is connected in series with a fixed resistor, how to explain the p.d. varies as resistance temperature changes?
When two components are connected in series, where one is a fixed resistor and the resistance of the other can vary (e.g. thermistor,...
Evan Toh
Oct 21, 20241 min read
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Basic Concepts on DC Circuit – River System
The ‘D.C.’ here mean direct current . It means that the current flows in one direction in the circuit . The direction of the direct...
Evan Toh
Oct 21, 20241 min read
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Factors that affect the resistance of a conductor
In general, assuming temperature of a conductor is constant, the resistance of a conductor is affected by 1) length (L) – [L increases, R...
Evan Toh
Oct 21, 20241 min read
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What is Total Internal Reflection (TIR)?
Overview of Total Internal Reflection (TIR) Explanation of the various stages:
Evan Toh
Oct 21, 20241 min read
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Minimum force F to push barrel up a step
Answer: Option D
Evan Toh
Oct 20, 20241 min read
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Video 02 Finding resultant force from vector diagram provided
(1) 2003PPq1q7 (0 min to 2.42 min) Ans: Option A (2) 2023PPp1q4 (2.47 min 3.54 min) Ans: Option C (3) 2018PPp1q2 (3.45 min to 6.22 min)...
Evan Toh
Oct 20, 20241 min read
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Video 01 How to find resultant force of two or three forces (without drawing vector diagram)
Below are some examples of questions that involve finding the resultant force due to two or three forces. Below are the questions in the...
Evan Toh
Oct 20, 20241 min read
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Finding Forces on Multiple Bodies
(1) (2) (3) (4)
Evan Toh
Oct 20, 20241 min read
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Evan Toh
Oct 18, 20240 min read
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Evan Toh
Oct 17, 20240 min read
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Evan Toh
Oct 17, 20240 min read
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Evan Toh
Oct 17, 20240 min read
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Evan Toh
Oct 16, 20240 min read
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Evan Toh
Oct 16, 20240 min read
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Balancing Toys
There are two main types of balancing toys. Type 01: CG below the pivot point Type 02: CG above the pivot
Evan Toh
Oct 16, 20241 min read
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