Homework 1
ME 230, Winter 2016
Assigned: January 4, 2016. Due: January 8, 2016
1. In Ex. R1.3 of Recitation 1, the ball spent equal times in traveling upwards and downwards, do you think it was just a coincidence or it is always the case. Why? Hint:
see i
’15-101. The 2-kg hall rotates around a 0.5—m—diameter:
circular path with a constant speed. If the cord length
ﬁtortened from I = l m to l’ = 0.5 In, by pulling the cord
“through the tube, determine the new diameter of the path
4". Also, what is the t
1. (25%) The automobile is originally at rests =
O. For 0 < S < 300 ft, the car accelerates
uniformly and reaches a speed of 30 ft/s at.
s = 300 ft. When the car enters the curve road,
it starts to increase its speed at 1'; = (0.015)
ft/sz, where sis in f
. (25%) The 2kg pendulum bob moves in the
vertical plane (i .e., consider gravity) with a
velocity of 4 m/s when 6 = 0, which represents
the horizontal position. Neglect the size of the
bob, and answer the following questions.
(a) What is the tension in t
. (25%) The automobile is originally at rests =
0. For 0 < S < 300 ft, the car accelerates
uniformly and reaches a speed of 50 ft/s at
s = 300 ft. When the car enters the curve road,
it starts to increase its speed at 1'7 = (0.023)
ft/sz, where S is in fe
1. (25%) The 3kg pendulum bob moves in the
vertical plane (i.e., consider gravity) with a
velocity of 7 m/s when 6 = 0, which represents
the horizontal position. Neglect the size of the
bob, and answer the following questions.
(a) What is the tension in t
ME 230 Kinematics and Dynamics
Winter Quarter 2015, Second Exam
2/20/15, 12:30 pm 1:20 pm
(Please
justify your work and demonstrate your understanding of the
subject matter in order to receive the full credit.)
Name: _
Student No.: _
Section No.: _
particle kinematics
rectilinear motion
a = dv
v = ds
ads = vdv
dt ;
dt ;
v = v0 + ac t ;
s = s0 + v0 t + 12 ac t2 ;
v 2 = v02 + 2ac (s s0 )
curvilinear motion
rectangular
v = vxi + vy j + vz k & a = axi + ay j + az k
x
vx = dx
ax = dv
dt = x
dt = v x = x
ME 230 Kinematics and Dynamics
Summer Quarter 2016,
Midterm 2 (60 min.)
Wed. 8/1/2016, 10:50-11:50am
STUDENT NAME: _
Student ID Number: _
Instructions:
Do NOT turn this page until you are told to begin.
SHOW FREE BODY DIAGRAMS FOR FULL CREDIT
Problem 1 (5
Midterm 2 problem 2 solution
Statement: a 10-kg slender bar of uniform cross-section is released from rest from the position shown.
The length of the bar is 2 meters. The surface is rough with a static coefficient of friction, s = 0.25.
Determine whether
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ME 230
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ME 230 Exam #3
Spring 2012
Problem#1(35 points) Name: Emtg Alonzo
The slider A moves in the slot at the same time
that the disk rotates about its center 0 with an
angular speed to positive in the counterclockwise
sense. Dctemne the x and ycomponents of th
(9,9: ME 230 Exam#2 Spring 2012
Problem #; (35 points) Name: . W1] I At OHLQ
and exactly 1 s after the system is released from rest, determine m3 and mo in
Knowing that Blocks B and C strike the grond simultaneously lo/af
terms of mA u *Fb g. 2 9M4; _ "
Homework 6
ME 230, Spring 2016
Assigned: April 29th, 2016. Due: 5pm, May 6th, 2016
1. The two springs, each of stiffness k =1.2 kN/m, are of equal length and undeformed
when = 0. If the mechanism is released from rest in the position = 20 , determine
its
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