P1 3/4

PP N2010 P1 Q4 Two objects same size and shape but one is heavier. Motion when both released

Evan Toh

Dec 31, 20231 min read

PP N2010 P1 Q4 Two objects same size and shape but one is heavier. Motion when both released

Solutions: Option C When a body is released from rest, the only force acting on the body is its weight due to gravity . Both bodies...

12 views0 comments

Identifying what lens, focal length and image from 2 rays – PP2010P1Q23 and SP2014P1Q11

Evan Toh

Dec 31, 20231 min read

Identifying what lens, focal length and image from 2 rays – PP2010P1Q23 and SP2014P1Q11

These 2 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...

2 views0 comments

Where is the focal point of lens L1 and L2?

Evan Toh

Dec 31, 20231 min read

Where is the focal point of lens L1 and L2?

Answer: Option A Refer to the diagram (below left) which many are familiar. When parallel rays of light which are parallel to the...

2 views0 comments

Barometer with a layer of water – Find height of mercury H

Evan Toh

Dec 31, 20231 min read

Barometer with a layer of water – Find height of mercury H

Answer: Option B

3 views0 comments

PP2006P1Q21 SP2009p1q11-how many students can see the images of the other two

Evan Toh

Dec 31, 20231 min read

PP2006P1Q21 SP2009p1q11-how many students can see the images of the other two

Answer: Option D

2 views0 comments

Determine the motion of the particles on transverse wave

Evan Toh

Dec 31, 20231 min read

Determine the motion of the particles on transverse wave

Instead of imaging how the particles will move and guess their motion, there is a technique which can help you to determine that. In...

68 views0 comments

2013SPp1q17 What is the new P when V across resistor is doubled? Similar 2018PPp1q31

Evan Toh

Dec 31, 20231 min read

2013SPp1q17 What is the new P when V across resistor is doubled? Similar 2018PPp1q31

Answer: Option C View the videos below to learn how to solve it. There are more than one method. Alternatively, you may put values to...

11 views0 comments

Determine focal length of lens using mirror with object and image aligned

Evan Toh

Dec 31, 20231 min read

Determine focal length of lens using mirror with object and image aligned

Answer: Option B

2 views0 comments

Lens, screen and mirror – what kind of image formed on screen

Evan Toh

Dec 31, 20231 min read

Lens, screen and mirror – what kind of image formed on screen

Answer: Option C

2 views0 comments

Light involving 2 mirrors - periscope (PP2007P1Q20 and PP2012P1Q22)

Evan Toh

Dec 31, 20231 min read

Light involving 2 mirrors - periscope (PP2007P1Q20 and PP2012P1Q22)

Answer: Option D

2 views0 comments

Using barometer to estimate height of mountain

Evan Toh

Dec 31, 20231 min read

Using barometer to estimate height of mountain

At sea-level, the barometer which Pie is holding reads 760 mm of Hg. When he is at the top of Mount Pie, the same barometer reads 230 mm...

2 views0 comments

Time interval between two sounds from a gun – direct and reflected sound

Evan Toh

Dec 31, 20231 min read

Time interval between two sounds from a gun – direct and reflected sound

Solutions: Option B You can view the video tutorial here or the written solutions below.

3 views0 comments

What is the current in wire OP? Is it flowing from O to P or P to O?

Evan Toh

Nov 30, 20231 min read

What is the current in wire OP? Is it flowing from O to P or P to O?

Solutions: Option B Whatever that goes in has to come out. With this basic concept, you will be able to solve this question easily....

1 view0 comments

Finding specific latent heat of vaporisation (lv) (pure physics)

Evan Toh

Nov 30, 20231 min read

Finding specific latent heat of vaporisation (lv) (pure physics)

Take note that the question is looking for specific latent heat of vaporisation during boiling. Hence information of mass m1 before...

3 views0 comments

Evan Toh

Nov 30, 20231 min read

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...

4 views0 comments

Resultant force-time graph link to speed-time graph

Evan Toh

Nov 30, 20231 min read

Resultant force-time graph link to speed-time graph

Answer: Option A Refer to the video tutorial below for explanation.

3 views0 comments

Evan Toh

Nov 30, 20231 min read

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...

2 views0 comments

Which 2 junctions to connect to ahieve greatest resistance?

Evan Toh

Nov 30, 20231 min read

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.

1 view0 comments

Moments – Where is the new CG when when a hole cut out?

Evan Toh

Nov 30, 20230 min read

Moments – Where is the new CG when when a hole cut out?

2 views0 comments

Kinematics – Two balls free-fall with different mass and height

Evan Toh

Nov 30, 20231 min read

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.

3 views0 comments