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TRUING DAI HOC SU" PHAM KY THUAT THANH PH6 HO CHI MINH KHOA CO KHI CHE TAO MAY BO MON CO SO THIET KE MAY BE THI CUOI KY HOC KY 2 NAM HOC 2019-2020 Mon: CO KY THUAT Ma mon hoc: ENME230720 Dg so/Ma dg: 01 Dg thi co 02 trang. Thai gian: 90 phut. Dirge phep sur dung 1 to giiy A4. Cau 1: (1.5 digm) Cho ca he nhu hinh 1. Xac dinh phan luc lign kgt tai g6i c6 dmh A va g6i tua B? H in h l Cau 2: (2.5 digm) Cho ca he nhir hinh 2. Xac dinh phan luc lign kgt tai A va B1 Cau 3: (1.5 digm) The slider block C moves at 10 m/s down the inclined groove (figure 3). Determine the angular velocities of links AB and BC, at the instant shown? vB = 1 2 f i t s vc —10m / s Figure 3 Cau 4: (1.5 digm) Cho ca he nhu hinh 4. Do sir trugt xay ra, cac digm A va B trgn vanh cua dTa c6 cac van t6c nhu trgn hinh ve. Xac dinh van t6c cua digm C va digm E a thai digm khao sat nhu trgn hinh ve? S6 hieu: BM1/QT-PDBCL-RDTV Trang 1/2 Cau 5: (3 diim) M§t ong cupn (hinh 5) c6 khOi lupng 20kg va ban kinh quan ti'nh dOi vai khOi tarn O la kQ= 0.4»j . Mpt vat n&ng 30kg lien ket vdi Ong cuon bang spi day quin quanh Ong cupn nhu tren hinh vg. Luc diu ca he dung yen, sau do buOng nhe cho vat nang rai xuOng vai khOng van tOc diu. Xac djnh khoang each ma khOi phai di xuOng ke tir vi tri ban dau de Ong cuon co van tOc g6c a) = 17rad/ s'? Bo qua khOi lugng cua day, ma sat giua Ong cuon va true quay tai O. Cho gia toe trpng truang g = 9.Slm/s2. Hinh 5 Ghi chu: Can bo coi thi khong duac giai thick de thi. Chuan dau ra cua hpc phan (ve kien thirc) [CBR 1.2]: Phan tich va tim dieu kipn can bang cua ca he duai tac dung cua he luc. [CBR1.3]: Xay dqng dupe phuang trinh chuyen dong va xac djnh dupe cac dac trung dpng hpc cua chit diem va vat rin. [CBR 1.4]: Nhan biit dupe hai bai toan hpp chuyen dpng cua diim va chuyen dpng song phing cua vat rin dOng thai biit phan tich va tinh toan dupe cac ddc trung dpng hpc trong hai bai toan nay. [CBR1.5]: Ap dung dupe cac dinh luat ca ban, cac dmh luat tOng quat va cac nguyen ly ca hpc cua dpng luc hpc de xac dinh cac ddc trung dpng hpc cua chit diem va vat rin chuyin dong duai tac dung cua cac luc. [CBR2.1]: Xay dung dupe mO hinh tinh phu hop cho cac bai toan th\rc te ky thuat. [CBR3.1]: Bpc hieu cac tai lipu ca ky thuat bang tiing Anh. Noi dung kiem tra Cau 1,2 Cau 3,4 Cau 3,4 Cau 5 Cau 1, 2, 3, 4, 5 Cau 3 N gay 14 thang 7 nam 2020 Thong qua bo mon (ky va ghi ro h

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