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Kinematics

Test

# 4

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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

)

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