# [J1] Lesson 29 (SHM + Techniques of Integration +Alkanes)

[J1 Physics PMCians] Oscillations – Simple Harmonic Motion

What we did in 2 hours:

We started our first lesson on Simple Harmonic Motion (SHM). We showed that the motion of a simple pendulum and a spring-mass system is simple harmonic, and that means that the displacementvelocity and acceleration varies sinusoidally (sine or cosine) with time

We practised using a simple procedure to solve all SHM questions, making a complex topic into something profoundly simple to understand.

What you take home:

Oscillations Daily Dose

Please download and print the Daily Dose for your personal revision. The answers and working are at the back:

https://tinyurl.com/y3b3rzhy

Special Mention:

Next lesson, we will conclude the topic of Simple Harmonic Motion!

Do not miss it as we give you a chance to practise applying your problem solving skills & discuss the energy concepts in this motion.

Till we meet again, enjoy the 1 week school break.

From you friendly tutors,

Mr Sim & Mr Kwok 🙂

[J1 Maths PMCians]

What we did in 2 hours:

We started on our final chapter before Promos Revision, Integration. Kicking off on Techniques of Integration, we recapped our fundamental skills from secondary school integration, and moved on to new formulae. Do note and aim to get familiar with the trigonometric variations and also format your expressions well to match the rational functions types!

Additionally, we covered the 4 standard forms. As practiced, do note that the key is to recognise a relationship between f and f’, and apply integration as a reversal of differentiation. Again, proper formatting is key!

What you take home:

The Daily Dose & worked solutions are linked here:

https://tinyurl.com/y2vsye4w

Special Mention:

We will consolidate our techniques from last week and also move on to some new, process-driven techniques.

See You and Stay Healthy!

Your Friendly Math Tutors

[J1 Chemistry PMCians]

What we did in 2 hours:

Alkanes are saturated hydrocarbons with no other functional groups, giving its unreactivity. The main reaction for alkanes is the halogenation of alkanes, described by the free radical mechanism. We have discussed the poor yield of the reaction due to various reasons, and learned how to estimate the ratio of the products formed, depending on the number of hydrogen available and the stability of the radical.

What you take home:

The solutions to Structured Question 16 and Everything you need to know series is found here:

https://tinyurl.com/y44m7jrt

Special Mention:

Next lesson, we will begin on our first formal functional group – Alkenes. Gentle reminder for online students to collect new books which will be used for our promo revision this week. Do check the opening hours of centres before coming down for collection.

Stay healthy!

Mr Leong

REDEEM A FREE TICKET FOR YOUR FRIEND 🙂

We are pleased to inform you that you will be able to redeem a free ticket for your friend to attend lesson with you. You may redeem this ticket via your Student Portal, under Referral and Rewards.

Take note:

• This ticket can only be redeemed once.
• The guest must attend lesson either onsite or online with you at the same timeslot.
• Free ticket only applies to non-PMC students who have never attended any PMC lessons before.
• Redemption period strictly before 31 August 2020. See you!