TRUING DAI HOC S lf PHAM KY THUAT
t h An h p h o h o c h i m i n h
HE THI CUOI HOC KY I NAM HOC 23-24
KHOA CO KHI CHE TAO MAY Mon: Cff ky thuat
BO MON CO S d THIET KE MAY Ma mon hoc: ENME130620
De so/Ma de: 01 De thi co 02 trang.
Thai gian: 90 phut. Ngay thi: 04/01/2024
Duac phep su dung tai lieu: 1 td A4 viet tay.
Cau 1: (1,5 diem)
Three forces Fx, F2 and F3are acting on the hook as shown in Figure 1.
a. Express Fv F2 and K in Cartesian vector form.
b. Determine the magnitude and direction of F3 if the resultant force has the vector
form as FR = 90/ + 30j (kN).
Hinh 2
Cau 2: (1,5 diem)
Thu gon he lire g6m ba lire d6u co do Ion bang P tac dung len vat nhu tren Hinh 2 vi
mot lire duy nMt (moment hop lire bang khong) tai A. Tinh do lan cua hop lire do va
khoang each x can thiet, bo qua be day va trong luong cua dam.
Cau 3: (1,5 diem)
Dam ABC chiu tai trong 100 kg tai A va chiu lien ket nhu tren Hinh 3. Xac dinh cac
phan luc lien kit tac dung len dim tai B va C. Bo qua trong luong cua dim, lay gia toe
trong trudng g = 10 m/s2.
Cau 4: (1,5 diem)
Cho co he chiu lire, chiu lien ket va dang a trang thai can bang nhu tren Hinh 4. Tac
dung mot lire P = 200 N len pe-dan lam can DCE quay quanh ban le D, keo theo cin
ABC quay quanh ban \h A thong qua ch6t C truot trong ranh cua cin ABC. Xac dinh do
S6 hieu: BM1/QT-PDT-RBTV/02 Lin soat xet: 02 Ngay hieu luc: 15/5/2020 Trang: 1/2
Ian cua lire cang day T. Bi6t rang T va P cimg phirang, bo qua ma sat a cac chot ban le
va trong ranh truot.
Cau 5: (2,5 diem)
Tai thoi diem khao sat, co he co vi tri nhir tren Hinh 5, banh xe A dang di xudng voi
van toe vA - 6 m/s va gia toe aA = 3 m/s2. Yeu cau:
a. Tinh van toe goc cua thanh AB\
b. Tinh van toe cua banh xe B\
c. Tinh gia toe cua banh xe B.
Cau 6: (1,5 diem)
The 30-kg wheel is subjected to a force P = 60 N
and rolls without slipping as shown in Figure 6.
Determine the number of revolutions it must make
to attain an angular velocity of 20 rad/s starting from
rest. The radius of gyration of the wheel about its
mass center ko = 0,3 m.
Figure 6
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
[G 1.2]: Thu gon duoc mot he luc ve mot tarn thu gon, phan tich dugc
cac thanh phan phan luc lien ket (ke ca luc ma sat) va thiSt lap dugc cac
phuemg trinh can bang cua chat di^m, cua vat ran, he vat ran.
Cau 1,2, 3 ,4
[G 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
[G 3.1]: Su dung dugc cac thuat ngu' tieng Anh ve co ky thuat. Cau 1, 6
Ngay 29 thang 12 nam 2023.Ay
T rin m g bo mon
Lin soat xet: 02 Ngay hieu lire: 15/5/20*20 Trang: 2/2
S6 hieu: BM1/QT-PBT-RDTV/02