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#OfficialPreparation #Writing 📺 🇬🇧 Even more practice interpreting Task 2 questions By Ryan 🥳 Anyone else who took IELTS in 2021, add up yours and welcome to send us✅ ↪ Want more⁉️ Just👇Stay tuned 🥳 ‼️Sharing is caring👇 @learn_english_with_Ezoza

I have here a pendulum I have an object 00:04 that weighs 15 kilograms and I can lift 00:07 it up one meter which I have done now 00:09 that means I've done work MGH is the 00:12 work I have done believe me 00:14 I've increased the potential energy of 00:15 this object 15 times 10 is about 150 00:19 joules if I let it fall then that will 00:23 be converted to kinetic energy if I 00:26 would let it swing from one meter height 00:30 and you would be there and it would hit 00:32 you you'd be dead 150 joules is enough 00:36 to kill you they use these devices to 00:40 call a wrecker ball they use them to 00:42 demolish buildings you lift up a very 00:46 heavy object even heavier than this and 00:48 then you let it go you swing it thereby 00:51 converting gravitational potential 00:53 energy into kinetic energy and that way 00:57 you can demolish a building you just let 01:00 it hit and it breaks a building and 01:05 that's the whole idea of wrecking so 01:10 you're using then the conversion of 01:12 gravitational potential energy to 01:15 kinetic energy now I am such a strong 01:20 believer of the conservation of 01:23 mechanical energy that I am willing to 01:27 put my life on the line if I release 01:33 that Bob from a certain height then that 01:40 Bob can never come back 01:42 to a point where the height is any 01:44 larger if I release it from this height 01:47 and it swings then when it reaches here 01:51 it could not be higher there is a 01:53 conversion from gravitational potential 01:55 energy to kinetic energy back to 01:57 gravitational potential energy and it 01:59 will come to a stop here and when it 02:01 swings back it should not be able to 02:03 reach any higher provided that I do not 02:08 give this object an initial speed when I 02:11 stand here 02:13 I trust the conservation of mechanical 02:16 energy 400% I may not trust myself I'm 02:24 going to release this object and I hope 02:26 I will be able to do it at zero speed so 02:30 that when it comes back it may touch my 02:32 chin but it may not crush my chin I want 02:37 you to be extremely quiet because this 02:39 is no joke if I don't succeed in giving 02:43 it zero speed then this will be my last 02:46 lecture I will close my eyes I don't 02:50 want to see this - please be very quiet 02:54 I almost didn't sleep all night three 02:59 two one zero 03:14 physics works and I'm still alive

T.me/isayevschool How to perform well in the IELTS Writing test ? 👩‍🏫Pauline Cullen