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Evan Toh
Oct 22, 20241 min read
2020PPp1q9 moments – Find force P acting on stick by shoulder
Using the concepts that POM, we know 1) Ma = Mc 2) net force on the stick is 0N. Most of us will most likely to take pivot about P as...
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Evan Toh
Oct 22, 20241 min read
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...
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Evan Toh
Oct 20, 20241 min read
Minimum force F to push barrel up a step
Answer: Option D
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Evan Toh
Oct 20, 20241 min read
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)...
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Evan Toh
Oct 20, 20241 min read
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...
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Evan Toh
Oct 16, 20241 min read
2015 PurePhy P1Q6 – Using Newton’s 3rd Law to find Forward Thrust
Refer to this MCQ from PurePhysics 2015P1Q6 Answer: Option C
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Evan Toh
Oct 16, 20241 min read
Direction of Frictional Force on Tyre or Wheel
For these type of questions, it is important to identify which tyre/wheel is connected/powered by the engine or the person. On each tyre...
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Evan Toh
Oct 15, 20241 min read
2021PPp1q36 DC circuit, which circuit has a potential difference between P and Q
Do you understand why there is a potential difference between P and Q? What if you are to find the potential difference between P and Q?...
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Evan Toh
Sep 30, 20242 min read
Finding focal length f of the lens using pin and mirror or sharp image from distance object
A thin convex lens is placed on a plane mirror and an object pin is then moved along the axis of the lens until an image is seen to...
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Evan Toh
Jan 31, 20241 min read
2013PPP1Q30 – Direction of the electric field around a negative charge
Ans: Option A View the video tutorial for the explanation:
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Evan Toh
Jan 1, 20241 min read
Ticker Tape Timer
Ticker tape timer is a device which punches dots on a tape at specific time interval. The tape can be attached to a moving object. With...
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Evan Toh
Jan 1, 20241 min read
2010SPp1q12 Lens - focal length definition
Answer: Option C Focal length f is the distance between the focal point and the centre of the lens (optical centre) . Note that only...
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Evan Toh
Jan 1, 20242 min read
2008PPp1q15,2017PPp1q15– Pressure constant, rate of collision decreases
When gas in piston and heated but pressure remains constant. It is easier to explain in terms of the average force acting on a unit area....
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Evan Toh
Dec 31, 20231 min read
Pressure – Height of ethanol in the column
Answer: Option D
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Evan Toh
Dec 31, 20231 min read
2 pistons of different pressure joined together - P1V1 = P2V2
Solution: Option C
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Evan Toh
Dec 31, 20231 min read
Which is a possible displacement-time graph for particle Y?
Answer: Option D
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Evan Toh
Dec 31, 20231 min read
Unusual Behaviour of Less Dense Balloon in Air or Water
Answer: Option A Of course if a heavy ball is suspended from the car we all know the ball will move in opposite direction of a...
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Evan Toh
Dec 31, 20231 min read
2021SPP1Q15 Electric field lines between the two charges
Answer: Option D View the video tutorial for the explanation
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Evan Toh
Dec 31, 20232 min read
SP N2007 P1 Q16 – Which events will cause the fuse to blow?
An electric cable contains three wires live, neutral and earth. The cable is correctly wired to a plug which contains a 3A fuse. The...
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Evan Toh
Dec 31, 20231 min read
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