Projectile Motion Problem Walk trough
Formulas:
V i=
x=
g ( x)
sin ( 2 O )
This is the equation we are using for this problem
V i sin( 2 O)
g
g x
2
Vi
()
2 O=sin1
V i=Initial Velocity
g=Gravity
x= Angle projectil was fired at
O=Distance projectil travele

Pr. 3.32: The slider A is in equilibrium and the bar is smooth. What is
the mass of the slider?
F
N cos 45o T sin 20o
x
N
200 N sin 20
0
o
cos 45o
96.74 N
Actual surface force N between the slider
and the bar is in the opposite direction
Do not change di

Pr 2.96-S: The cable AB exerts a 32-lbf T, on the collar A. (a) Find the minimum and maximum extent of the
distance d. (b) Express T in terms of components as a function of d. (c) Plot components of T versus d.
distace d is limited by
0 d rDC
T e ABT (1

9/13/2016
EXAMPLES. CHAPTER 2 (CLASS 3) GROUP STUDY
Pr 2.87: (Modified) The magnitude of the axial force in one of the
beams of a geodesic dome is |P| = 10 kN, The cartesian
coordinates of the endpoints A and B of the straight beam
are (-12.4, 22.0, -18.4

Q1-A
a)
M C ? if
M
A
0
b)
M
B
? if M C 10 kN m
Moment arm lengths = shortest distance between Line of
Action (LOA) of Force to the point of which moment is
calculated. If LOA passes through the point then moment
due to that force is 0 at that particular

10/5/2016
Pr. 5.18* (Modified): (a) Draw the FBD of the structure by isolating its
supports at A and E. (b) Determine reactions at A and E. (c) Find
the sum of moments about point C.
2
4
Ax
Ay
200 ft lb
Ax
1
Ay
Ey
100 lb
Ey
4
M
1
Couple acts
everywhere
40

r
6
i
4
j
12
k
m
F 28 i 14 j 42k N
Quiz 2 Makeup 3 Solution
6 i 4 j 12k m
6 i 4 j 12k
0
.
429
0
.
286
0
.
857
e
i
j
k
a) unit direction vector parallel to r r
2
14
6 2 4 12 2 m
Given
b) Magnitude of component of
F parallel to r
12k
6i
4j
F/ r F e

Table 43b. Strength properties of some commercially important Woods grown in the United States (inch-poundFcon.
Static bending Corn
Com- pression Shear Tension
Modulus Modulus Work to pression perpen parallel perpen- Side
of of maximum Impact parall

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Activity 2.2.3 Recycling
Purpose
Have you ever filled a trash bag, poured cereal from a box, hammered a nail into wood, or
consumed a soda from an aluminum can? That trash bag, cereal box, nail, or aluminum can was most
likely made from recycled materials

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Projectile Motion
Projectile motion is a combination of horizontal motion and
vertical motion.
The horizontal motion of a projectile is constant because no
gravitational force acts horizontally
The vertical motion of a projectile is nothing more than free

Activity 2.1.1 Centroids
Introduction
Finding the centroid of a shape like a circle or square is very easy. However for an
object such as a beam, the centroid is only represented by the geometric center if
the material is uniform or homogenous. Beams and

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