TRI/CJNG DAI HOC SU PHAM KY THU AT
THANH PHO HO Cffl MINH
KHOA CO KHI CHE TAO MAY
BO MON CO SO THIET KE MAY
DE THI CUOl HOC KY 2 NAM HOC 2023-2024
Mon: Co1 ky thuat
Ma mon hoc: ENME130620
Ngay thi: 03/06/2024 (he Dai tra)
De so/Ma de: 01 De thi co 02 trang.
Thai gian: 90 phut.
Dirge phep sir dung tai lieu: 1 td A4 viet tay.
Moc chiu tac dung bai hai luc F1 va F2 nhu tren Hinh 1. Yeu cau:
a. Bieu dien hai lire TJ va F2 theo cac vector dan
vi i , j ;
b. Bieu dien hap lire FR theo cac vector dan vi
ijl
c. Xac dinh do Ion cua hap lire FR.
y
Cau 2: (1,5 diem)
Thu gon he tai trong (gom ba lire va mot momen) tac dung len dam AB nhu tren Hinh 2
thanh mot hap lire (FR)A va mot momen (M R)A dat tai A. Xac dinh do Ion, phuang chidu cua
hop luc (hop voi phuang ngang) va momen hap lire dat len dam. Bo qua be day va trong luong
cua dam.
Cau 3: (1,5 diem)
Dam AB chiu tai trong phan bo va chiu lien ket nhu Hinh 3. Xac dinh cac phan luc lien kit
tac dung len dam tai A va B.
Cau 4: (1,5 diem)
Cho ca he chiu luc, chiu lien ket va dang a trang thai can bang nhu tren Hinh 4. Ch6t C co
the truot trong ranh doc theo phuang cua can CD. Xac dinh phan lire lien kit tai B. Bo qua ma
sat a cac chot ban le tai A, D va chot truot C.
S6 hieu: BM1/QT-PDT-RBTV/02 Lan soat xet: 02 Ngay hieu luc: 15/5/2020 Trang: 1/2 ^
Cau 5: (2,5 diem)
Mot dia tron co ban kinh 2 m lan khong trugt sang phai nhu tren Hinh 5. Tai thod diem khao
sat, dia tron co van toe goc co = 4 rad/s va gia toe goc a = 2 rad/s2. Yeu cau:
a. Tinh van toe cua tarn C;
b. Tinh van toe cua diem 5;
c. Tinh gia toe cua diem B.
Figure 6
Cau 6: (1,5 diem)
The 20-kg wheel is subjected to a couple moment M - 50 N.m and rolls without slipping as
Figure 6. Determine the distance its mass center G travels when it attains an angular velocity
of 20 rad/s starting from rest. Knowing that wheel has a radius of gyration about its center G of
Jcg = 0,3 m.
Ghi chu: Can bo coi thi khong, duac giai thick de thi.
Chuan dau ra cua hoc phan (ve kien thirc) Noi dung kiem tra
[CLO 1.2]: Thu gon dugc mot he lire ve mot tarn thu gon, phan tich
dugc cac thanh phan phan lire lien ket (ke ca luc ma sat) va thiet lap
dugc cac phuong trinh can bang cua chat diem, cua vat ran. he vat ran.
Cau 2, 3
[CLO 1.2]: Tinh dugc cac thong so dong hgc (vi tri, van toe, gia toe) cua
vat ran, diem thuoc vat ran trong chuyen dong phang.
Cau 5
[CLO 1.3]: Sir dung dugc phuong phap dong lugng va phuong phap
nang lugng de xac dinh dugc thong so dong hgc cua vat ran trong
chuyen dong phang dudi tac dung cua luc.
Cau 6
[CLO 2.1]: Phan tich va mo hinh hoa dugc mot so co cau phang trong
co khi bang cac mo hinh tinh tuong ung.
Cau 4
[CLO 3.1]: Su dung dugc cac thuat ngu tieng Anh ve co ky thuat. Cau 1
N gay 01 thang 06 nam 2024
rri o | a A
Trumig bo mon
TS. M ai Due Dai
S6 hieu: BM1/QT-PBT-RBTV/02 Lan soat xet: 02 Ngay hieu lire: 15/5/2020 Trang: 2/2 ^