Кронштейн удерживают в равновесии груз F1 и растянутая пружина, сила упругости которой F2. Весом частей конструкции, а также трением на блоке пренебречь. F1 = 13 кН F2 = 7 кН

dear lisa,  thanks for your letter. i (1) just left / had just left for school when i saw the postman and  he (2) gave / had given it to me. it was really funny! i (3) read / had read it during maths  and it (4) made / had made me laugh. i almost (5) got / had got in trouble!   anyway, i'm excited because i (6) had / had had my first judo lesson yesterday. i (7) was  / had been late for the lesson because when i (8) got / had got there, i suddenly realised  i (9) left / had left my judo suit at home! so i (10) went / had gone all the way home  and when i (11) got / had got back, the lesson (12) already began / had already begun.  the instructor was really nice, though, and i (13) learned / had learned how to do some basic  throws. can't wait till next time !   what about you and your taekwondo? the last time i (14) spoke / had spoken to you, you  (15) talked / had talked about giving it up. what (16) did you decide i had you decided?   i think that's all for now. my mum and i are going shopping shortly, so i'd better post this.  speak to you soon.  love,  charlotte