------Kinematics Test # 4-----

brontidegrrrMechanics

Nov 14, 2013 (3 years and 7 months ago)

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------
Kinematics

Test

# 4
-----

Name:_________________




Date:__________________


Directions:


a) Answer all questions the require a written answer in comple
te sentences. Point will be deducted if this is not done.


b) Show all work with appropriate units. Your work is worth more than your answer.


c) Circle all answers!!!


All problems are worth
:

(3pts each)



Using the Kinematic equations, choose th
e letter that appropriately describes that variable.

1)

V
i
:______


a) Change in velocity

2)

V
f
:_______

b) Initial velocity of an object

3)


t
:_______




c) Final velocity of an object

4)

A
:________

d) Initial location

5)

X
i
:_______


e) Final Location

6)

X
f
:_______ f) T
ime the object is traveling

7)

Δ
V
:______ g) Change in distance

8)

ΔX
:______

h) Acceleration


9)

V
elocity is a change in ____
______
_ and
__
_______
___
.


10)

____
__: (T/F) An object w
ill accelerate when an unbalanced force is placed on it.


11)

______: (T/F) The gravitational field of a planet is affected by the planets mass.



Use the following scenario to answer the following questions.

Two flying space monkeys, monkey A and monkey B, ta
ke off with the same velocity of 30 m/s

during Pluto’s annual “Peace Out to
Pluto 100 Second Space Monkey Race”
.

10 seconds
after taking off
, monkey B speed
s

up to 60m/s and then quickly slows back
down to 30m/s.

After 100 seconds the buzzer sounds and
the race is over.



Use A, B, or SAME to answer
:

12)

_____:
Which monkey will have the greatest average velocity?

13)

_____:

According to the given information, which monkey will experience a negative acceleration?

14)

_____: After the 100 seconds is up, which mon
key traveled the furthest?

15)

_____: If both monkey could not stop as they approached Plutos Gravitational Field, which would experience the greatest
gravitational acceleration


16)

Describe how to set up a speed trap. Include how the calculations are done.





17)

A car passes through a 1m speed trap in 2

seconds. How fa
st was it going?
Show work for credit!!





Graphing:

2) Sketch a
Position vs. Ti
me

graph for the following:

(3pts each)



a) An object that is stopped and then
begins to accelerates
.


b)

An object goes then stops and
does this repeatedly
.


c) An
object starts at a fast constant
velocity and then slows to a lower
constant velocity
.


3)

Use the chart to answer the following questions:


a)

___________:
What does the sl
ope of a distance vs.
time graph represent
?


b)

___________:
Between what points
is the super hero
slowing down


c)

___________:
Between what points is th
e obje
ct
accelerating

in the negative direction


d)

___________:

Between what points

is the
+ velocity

the greatest?


e)

___________:

What is the total di
splacement (distance
from home)

the

object went
?

The distance from where
they started to where they finish.


f)

___________:

How muc
h time does it take
t
he object to
travel the first 10 megameters
?


g)

Calculate the velocity between

the b and c

marker:
Must show all work!


h)

(+6 pts):

What is the overall average velocity. Hint:
total displacement divide by total time


Problems:

SHOW
ALL WORK

and Correct Units

(3pts)


1)

Super Dog the happy valley animal shelter mascot was lost one evening after leaving the pound. If the Super Dog walks with a

velocity of 2miles/hr, how far from the animal shelter should the pet detectives start looking
if he has been gone for 5 hours
.




2)

Later on down the road, super dog was de
tected flying through the sky in

England where the SI system is still used. Helix the paper
boy

clocked Super Dog flying 300 meters in 10 se
conds
:

How fast is super dog Moving.





3)

Unfortunately, super dog ran into a hay truck because

he

thought the paper boy was going t
o play catch with him,

so excited that he
did not look where he was going. If it took him .1seconds to stop from 30m/s, find his acceleration.






4)

After hitting
the paper truck and coming to a complete stop, super dog fell .9 seconds to the ground with impending influence of the
gravitational field. Find his velocity upon hitting the g
r
ound. Assume his initial velocity is zero.







5)

Extra C
:
If

MC Hammer

and S
uper Dog

accelerate

from zero

in the

Hammer Time Ride


at a rate of 5

m/s
2
, how far “X
f
” will he
have gone in 10

seconds?

(+3 pts)












6)

A water balloon

is dropped from a height of 30

meters.

a)

Draw the picture of the situation:


b)

Calculate how

long it takes for the balloon

to hit the ground:


Label: Vi, Vf, Yi, Yf, a, t















b)

Extra C:

If your little brother considering that you have

one, is running at a speed of 5

m/s, find the release
point indicating where to

drop the balloon to soak him.

(
+3

pts
)