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Evan Toh
Dec 12, 20240 min read
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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
7 views
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How to mark 2 points (at a distance apart) at the same level? (water finds its own level)
The video below demonstrates that water will find its own level. An question requires this concept: An apartment block receives water...
Evan Toh
Nov 2, 20241 min read
32 views
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Evan Toh
Oct 23, 20241 min read
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Fiery Re-entry into Earth’s Atmosphere
First astronauts launched by SpaceX returned home safely on 3 Aug 2020.
Evan Toh
Jan 1, 20241 min read
29 views
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Understanding Conservation of Energy and applying in calculation questions
Page 4 of Work Energy and Power: Understanding COE
Evan Toh
Dec 31, 20231 min read
182 views
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Force required to pull the block up the inclined plane
There are 3 scenarios with slight variations. Calculate the force F needed to pull the block up the inclined plane. View the video below...
Evan Toh
Dec 31, 20231 min read
55 views
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Evan Toh
Dec 31, 20230 min read
24 views
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Oscillating or Vibrating Object in a Wave Motion
When an object is oscillating or vibrating in a wave motion , the speed of the object varies along the path. In this video, there are...
Evan Toh
Dec 31, 20231 min read
51 views
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N2007P1Q9 Pure Physics – Energy needed to pump water up a building
Answer: Option B Since water will naturally reach 40m high from the bottom of the apartment, you only need to pump the water up by a...
Evan Toh
Nov 30, 20231 min read
11 views
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When is there work done?
Work done W = F x d Only when there is distance moved in the direction of the force , there is work done. (i.e. look for the distance...
Evan Toh
Nov 30, 20231 min read
28 views
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