# [S4] Lesson 25 (Kinematics + Coordinate Geometry + Stoichiometry EOY )

[S4 Physics PMCians]

What we did in 2 hours:

On the 20th and 21st June, the S4PH has come together to cover the following during our weekly zoom lessons:

1) Recap on what we have covered in Secret Enclosed Kinematics Concept 1 and 2,

2) Kinematics Final Lap Part 2 (Structured Qns 1 to 5), and

3) 4Qs on kinematics

Always remember:

1) To solve any question related to Kinematics, draw the v-t graph first as this graph gives the acceleration (gradient) and distance traveled (area)

2) To convert graphs, ask yourself the 2 questions: a) Is it +, – or zero? b) Is it increasing, decreasing or constant

3) To describe the motion, we will also ask ourselves the two questions (as above) and include a) the velocity, b) acceleration, and c) direction of motion

4) To explain water resistance or air resistance-related motion, a free-body diagram is helpful. And, remembering how drag force is related to speed is essential.

What you take home:

We will continue with Dynamics Revision Lesson where we will do our Secret Enclosed Summary and applying them to questions through our Thinking-Aloud Approach.

Special Mention:

Should you have any questions, please feel free to send in your questions (and attempted workings) to 9100 1235. We will do our utmost to assist you in the questions.

Take care and Always with you,

The S4PH Tutors

(Mr Shane, Dr Li and Mr Gary)

[S4 Maths PMCians]

What we did in 2 hours:

We started on Coordinate Geometry Revision. We recapped the various formula involved and went on to the two main concept:

1. Finding equation of straight line
2. Finding the coordinates

We practise varieties of questions in the booklet and ended off with a short test to determine how well you are at it! Note that Coordinate Geometry will usually appears as a long question in exam, so be extra meticulous.

What you take home:

Coordinate Geometry Test :

https://tinyurl.com/ycyn235z

The Last Lap – Take Away Questions :

https://tinyurl.com/y6w2ucqk

Solution to Q4 and Q5 :

https://tinyurl.com/ycozyprl

Special Mention:

We will be continuing our live lecture on Circle revision coming week. Stay healthy, stay safe, see you this weekend!

[S4 Chemistry PMCians]

What we did in 2 hours:

We have completed our revision on moles and how it is used to calculate different measurement units of a substance (e.g. 24 dm3 of oxygen gas = 1 mole of oxygen gas = 32 g of oxygen gas).

What you take home:

Do take some time to complete the Take Home Package on Stoichiometry in preparation for our class this weekend.

Special Mention:

With the understanding from the previous lesson, we are ready to deepen our appreciation of stoichiometry where we use balanced chemical equations to accurately figure out number of moles and calculate measurement units of various substances in a reaction.

Home-Based Learning (HBL)

1) One Weekly PMC Lecture Webcast (www.pmc.sg/lecture)

2) One Weekly PMC LIVE Tutorial (www.pmc.sg/live)