Evan Toh
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...
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Evan Toh
Nov 21 min read
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...
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Evan Toh
Oct 231 min read
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Evan Toh
Jan 11 min read
Fiery Re-entry into Earth’s Atmosphere
First astronauts launched by SpaceX returned home safely on 3 Aug 2020.
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Evan Toh
Dec 31, 20231 min read
Understanding Conservation of Energy and applying in calculation questions
Page 4 of Work Energy and Power: Understanding COE
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Evan Toh
Dec 31, 20231 min read
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...
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Evan Toh
Dec 31, 20230 min read
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Evan Toh
Dec 31, 20231 min read
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...
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Evan Toh
Nov 30, 20231 min read
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...
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Evan Toh
Nov 30, 20231 min read
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...
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