this is the back of the other one! UPDATE : Name: ______________________________
ID: 3279421 • Letter: T
Question
this is the back of the other one!
UPDATE :
Name: __________________________________________
Due Date:
0
9
/
18
/1
7
STUDY GROUP
PARTNER(S)
:
________________________
_________________________________________________
PHY
1250/OSU
-
Newark
Quiz #
2
: Chapters 3 & 4
You may use a calculator, but please
show all work
and relevant reasoning. Make sure that you
report answers with their
proper units and directions, when appropriate. This take home quiz is to be taken “open book” and group work is encouraged.
PLEASE WRITE THE NAME(S) OF YOUR STUDY GROUP AT THE TOP OF THIS QUIZ
. If necessary, please
attach any add
itional work to this quiz.
Please put a box around your final answers
. Here are some relevant equations:
2
2
2
2
2
2
2
2
2
2
,
tan
,
cos
,
sin
,
m/s
8
.
9
ˆ
ˆ
,
2
,
,
2
1
,
2
,
,
2
1
c
b
a
a
b
c
a
c
b
g
j
A
i
A
A
y
a
v
v
t
a
v
v
t
a
t
v
y
y
A
A
A
x
a
v
v
t
a
v
v
t
a
t
v
x
x
Earth
y
x
y
o
y
f
y
o
y
f
y
o
y
o
f
y
x
x
o
x
f
x
o
x
f
x
o
x
o
f
y
y
x
x
1.
Vectors
and
are given in unit vector notation, where
and
are unit vectors in the
x
and
y
directions, respe
ctively,
such that:
and
.
a.
Find the resulting vectors of
:
and in unit vector notation.
[
2
points]
b.
What are the magnitudes and directions of the resultant
vectors
,
with respect to the +
x
-
axis
?
[
4
points]
2.
A projectile is fired at an angle
()
from the horizontal ground level towards
the wall of a building that is
195 meters
away, with an initial velocity whose vertical component is
29.3 meters/second upwards
,
strik
ing
the wall
5 seconds
later.
a.
What is the maximum height of the projectil
e above
the horizontal
ground level?
[
3
points]
a
b
c
j
i
A
ˆ
27
ˆ
13
j
i
B
ˆ
14
ˆ
4
A
B
i
ˆ
j
ˆ
B
A
C
B
A
D
D
C
&
b.
How far above the
horizontal
ground
level
does the projectile hit the wall?
[3
points]
b. How far ahove the borizontal ground level does the projectile ht the wall? 1B points c. What is the projectile's velocity when it hits the wall? 13 paints slingshot to feed banana to 1 monkey who is too shy to come down from a tree. 8ONUS: A 200kerper uses be ains (A) above, (8) at ar (C) below the mookey's staticeary position if the monkey gets starded und lets g branch the instant the hananu is relcased' (Circle oue) Yeu mest esalain seur neasmin far any. eredli 15 polExplanation / Answer
Since figure of question 1 is not given, all parts of question 2 is solved.
2 a) maximum height above ground level = vy^2 /2g
= 29.3^2 /(2*9.8)
= 43.8 m
b) height at which projectile hits = vyt - 0.5gt^2
= 29.3*5 - 0.5*9.8*5^2
= 24 m
C) velocity v = sqrt(Vx^2 + Vy^2)
= sqrt ((195/5)^2 + (29.3-5*9.8)^2)
= 43.7 m/s answer
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