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Surname_
Answers for ENGG1010 Quiz, Part B- Dynamics, 20 October 2009
Answer both questions. Write your answers on this question sheet and submit this sheet only.
QB1. Bar AB is hinged to the edge of a circu
Fluid Mechanics Problems 2
Consider a gate CD, which is shown below and can be (a) rectangular, (b) circular, and (c) triangular
in shape. The gate is only hinged at the top, and has no support elsewhere. Find the moment to be
applied at the hinge in each
Fluid Mechanics Problems 1
1.
Some people say that the seawater level will rise as a result of the melting of an iceberg.
How true is this statement?
2.
As is schematically shown below, a boat carrying a rock floats on water in a lake. What
happens to the
Department of Mechanical Engineering
The University of Hong Kong
Foundations of Engineering Mechanics
ENGG1010 (2010 2011)
"Mechanics of Fluids"
Lecturer:
Dr. C.O. Ng (office: HW7-1; phone: 28592622; email: cong@hku.hk)
Required Text: Fundamentals of Flui
ENGG1010 Revision Notes
1. Mechanism is 1 dof system
2. Acceleration has two parts: speed and direction changes
3. Constatnt acceleration is a very special case, but
vdv=ads is general for rectilinear motion
4. Beware of usual symbols and drawing conventi
Exercises of Chapter 2 Kinetics
Q1 (BF14.7) The 8-kg object starts from rest on an inclined surface with friction
coefficient of k=0.1 at t=0 and is subjected to a constant horizontal force F=40N.
(a) How fast is it moving at t=3s? (b) What distance has i
43
Chapter 2. Kinetics
2.1 Rectilinear Motion (Newtons law)
(N
Newtons second law states that the total force on a particle is equal to the rate of
change of its linear momentum, which is the product of its mass and velocity:
()
d
F=
mV ,
dt
dV
if m is co
Exercises for Chapter 1 Kinematics
1. An impulsive retarding force of 3 seconds duration acts on a
particle which is moving with a forward velocity of 60 m/s. The
oscilloscope record of the deceleration is shown. Determine the
approximate velocity of the