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2007PPP1Q27 brightness of bulb
Solutions: Option B As lamp X is thicker and shorter , these two factors make the resistance of X lower than Y . Recall: Length...
Evan Toh
Nov 30, 20231 min read
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Resultant force-time graph link to speed-time graph
Answer: Option A Refer to the video tutorial below for explanation.
Evan Toh
Nov 30, 20231 min read
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Finding effective resistance when a wire is bent into different shapes
The concepts needed to solve such questions Length increases, resistance increases and vice versa. Finding resistors in parallel and in...
Evan Toh
Nov 30, 20231 min read
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Which 2 junctions to connect to ahieve greatest resistance?
Based on individual calculations, the highest effective resistance will only be achieved if the junctions are connected at Q and S.
Evan Toh
Nov 30, 20231 min read
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Evan Toh
Nov 30, 20230 min read
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Kinematics – Two balls free-fall with different mass and height
Solutions: Option B Key concepts: Both balls are free-falling, hence both will experience the same acceleration due to gravity 10 m/s2.
Evan Toh
Nov 30, 20231 min read
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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
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2004PPp1q4 2010SPp1q4 Dynamics (3rd law)
Answer: Option D Key concept here is Newton’s 3rd Law. Action equals reaction. Both trolleys are connected by the spring, hence the...
Evan Toh
Nov 30, 20231 min read
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Kinematics – Swimmer in river with current, find distance downstream
Solutions: Option B Without the current in the river, the time taken for the swimmer to reach Q is 50s. This is based on the vertical...
Evan Toh
Nov 30, 20231 min read
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Kinematics Question – Using gradient and area under graph
Solutions: Option B
Evan Toh
Nov 30, 20231 min read
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Relationship between Pressure and Length of a Cube
Answer: Option A
Evan Toh
Nov 30, 20231 min read
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PP2010P1Q23 and SP2014P1Q11 - Identifying what lens, focal length and image from 2 rays
These two questions are actually the same. Q23 is from 2010 Pure Physics P1 while Q11 is from 2014 Sci Physics P1. Take a look at these 2...
Evan Toh
Nov 30, 20231 min read
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Pressure – Question on Manometer
Solutions: Option A
Evan Toh
Nov 30, 20231 min read
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