W7 PASS

W7 PASS

W7 PASS

W7 PASS

TODAY’S SESSION

TODAY’S SESSION

KAHOOT

Multi choice quiz :)

TEST 2 practise!!

• Covering weeks 5-8
• Solutions in slides xx

MOMENT OF THE MID SEM

Moment of the mid sem

MOMENT of the Mid sem

JAS’ Moment of the mid sem

MOMENT of the Mid sem

TRAV’s Moment of the mid sem

WEEK 7 (before the break)

GET AHEAD!

This week is slightly less dense

• Finish thermodynamics ASAP
• Get cracking on revision

!!!

• Consider leaving w9 till after test

EFFORT / WORK / ENERGY

Work and energy are the same

(when looking for ΔE - we can use work done)

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In some scenarios you need to use GPE or KE if they define W as KE…

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“Work is defined as kinetic energy…”

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EFFORT / WORK / ENERGY

Hi Jas and Travis,

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Since work has the same units of energy, it's often easy (and justified by the work-energy principle) to simply include it in an energy balance equation, but fundamentally work and energy are not the same.

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Work is a process that enables the transfer of energy. For example, in lifting a book vertically you do work on the book, which is stored as gravitational potential energy of the book. Or in using a force to accelerate an object over a distance (across a frictionless surface) the work you do on the object goes into increasing the kinetic energy of the object.

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In contrast, energy is a quantity that characterises the state of an object (matter). While an object can have a certain amount of energy, you wouldn't say that the object has an amount of work. Energy, however, can be used to do work (again, given by the work-energy principle).

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Hope this helps.

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Best regards,

Kris

1. MOODLE self-review tests
2. End of workshop multi choices
3. Youtube to revise theory (don’t rewatching lectures)
4. PASS practise test
5. Textbook questions
6. Know your formula sheet!

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W9 test

two (2) A4 sheets with any notes you like on both sides

20 MCQs - 60 minutes to complete the test. ~3 mins per Q

1. FLAG AND MOVE THE F ON
2. Don’t be overwhelmed by the information presented. Always break it down into all the variables presented and what you need to find
1. This will allow you to figure out the required formula
2. Appropriate formula is sometimes the simplest

If there is mass and acceleration (F=ma)

• Pay attention to the units
• Pay attention to sig.figs
• Once finished double check your flagged questions

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DURING THE TEST

TEST PREP

W5-8 content

KAHOOT time

WIN OF THY WEEK

Will smith question

WIN OF THY WEEK

Will smith question

test time

Link: tinyurl.com/bms1031mock��Breakdown:�

• Wk 5: 3 Questions
• Wk 6: 4 Questions
• Wk 7: 3 Questions
• Wk 8: 6 Questions

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Q1

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Q2

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Q3

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Q4

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Q5

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Q6

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Q7

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Q8

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Q9

Sorry if anyone did the test early, answer should be 95.78C not 104.7C. Water has to decrease in T to match the increased T of the pan!

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Q10

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Q11

A raccoon (mass = 10 kg) launches itself from a roof at 2 m/s and speeds up to 6 m/s. How much work did the raccoon do?


=(Use ΔKE = ½m(vf² – vi²))

= 160J

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If the raccoon burned 800 J of metabolic energy to achieve this speed, what is the efficiency of its energy use for physical work?

Efficiency = useful work output / total energy input × 100%)

=160 J / 800 J

=20% efficiency

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Q11

Q12

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THIS IS WRONG I FORGOT TO SQUARE THE AREA IN STEP ONE

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Real answer for whole thing should be 4.584 µm

Q13

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Q14

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Q15

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Q16

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This question should be worked out using W=Fdcos() not the GPE and KE

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If assessors wanted to use GPE or KE they will define it in the question:

“Energy is defined as…”

We done!

Good luck for your test if I don’t see you!

WEEK 8 revision for thermodynamics next week <3