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I Failed The First PHYSICS quiz.. I need help to make sure I don't fail the second, please HELP :)

G

GoldenGuppy

Diamond Member
I just need a few help and checks on some problems, Thanks in advance again 😉

1) A car is driven 125 km west and tehn 65 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)? Draw a diagram

2) A delievery trust travels 14 blocks north, 16 blocks easy, and 26 blocks sount. What is its final displacement from the origin? Assume the blocks are of equal length

3) A skier is accelerating down a 30.0 degree hill at 3.80 m/s^2. What is the vertical component of her acceleration? (b) How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 335?

4)Romeo is chucking pebbles gently up Juliet's window, and he wants the pebbles to hit the window w/ only a horizontal component of velocity. He is standing @ the ege of a rose garden 8.0 meters below her window and 9.0 meters from the base of the wall. How fast are the pebbles going when they hit her window?

Thanks again 🙂
 
i suggest you sign up for aol and use their msgboard to post all ur hw probs 🙂
trust me on this, u will get helped and ur grade will improve
-*---
let me add this b4 someone says crap to me about how i can suggest or have aol.
through personal experience their feature of hw helping is the only reason why i am member of aol, no other reason.
--
get the 9.95 fee one, own connection, well worth th 10 bucks
a personal tutor costs > 10 an hr, think about it
 
<< A delievery trust travels 14 blocks north, 16 blocks easy, and 26 blocks sount >>

Screw fysix, you need an english/typing class 🙂

🙂
 
Hey goldenbear you go to cal?
this isn't really physics just vectors if you didn't get all your answers pm me
 
do you even know the formulas for each of these. too tired to think right now, jsut got back from the gym. e-mail me if you need any help with the formulas and stuff.
 
uuhh... the first two are easy if you draw a diagram, I dont really think you need any help on those unless you are REALLY lazy.

The third one is just finding the vertical component of the acceleration... If you dont know it, you wont learn anything by us telling you

fourth one is a bit harder, work out how hard you would have to chuck a rock vertically to have it stop a 9m and then work out the time taken, the divide the 8m by the time taken to get the horizontal velocity.

Sorry to sound uptight or anything but doing this wont help you learn anything 🙂
 
Edit: I had nice ascii graphs for you, but the forum didnt like that. Gimme your email, and I can send it to you later

Dear Guppy,

Honestly, if you want to do good physics the best place to start is with the drawing and starting equation. I dont have a scanner so I can't, scan you the drawings for these but I'll do my best.

1) A car is driven 125 km east and then 65 km southeast. What is the displacement of the car from the point of origin (magnitude and direction)? Draw a diagram

A1 A2 A=125, B=65, X=45 degrees, C=?, O=? Y=180-45
------->--------|
\ O X \ Y |
\ \ | Magnitude EQN: C^2=A^2+B^2
\ \ | Direction: Find (A1+A2)
\ \B | (A2)=Bcos(Y)
C \ \ | Find O
\ \ | (A1+A2)/C=cosO
\ \ |
\\|
VV

2) A delivery truck travels 14 blocks north, 16 blocks east, and 26 blocks south. What is its final displacement from the origin? Assume the blocks are of equal length

A A=16, B=26-14
------------
\ | EQN: C^2=A^2+B^2
\ |
\ | B
C \ |
\ |
\|

3) A skier is accelerating down a 30.0 degree hill at 3.80 m/s^2. What is the vertical component of her acceleration? (b) How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 335?

|\ X=30 degrees, A=335, a=3.8
|X\
| \ Vertical Acceleration: ay=asecX
| \
| \ a
| A \ C
|ay \
| \
V \
-------->V
B ax

4)Romeo is chucking pebbles gently up Juliet's window, and he wants the pebbles to hit the window w/ only a horizontal component of velocity. He is standing @ the ege of a rose garden 8.0 meters below her window and 9.0 meters from the base of the wall. How fast are the pebbles going when they hit her window?

Maybe its just been a long time but, you are going to need more variables than this, possibly time is written somewhere on the assignment, but you just didnt write it down? In that case find the length of the hypotenuse, then use that in d/t=v. Then use the distances to find the unknown angle from where he is throwing. Finally, use that angles as X. Vx=VcosX, and thats your answer.

Thanks again
no problem
 
>>) A delievery trust travels 14 blocks north <<

you need to take a finance &amp; economics course first...

There are major regional restrictions on where &amp; how far delievery trusts may be transported....

on an aside... reading the GD text book &amp; paying attention in class helps too..
 
3) A skier is accelerating down a 30.0 degree hill at 3.80 m/s^2. What is the vertical component of her acceleration? (b) How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 335?
 
Wow 13 years later so much has changed. September 11 happened. Our country went into a war that made no sense.

Facebook and Google.

Ballmer is out.

Ebola

Black president with Muslim sounding name.

Massive market crashes, property bubble.

4 CPUs in the average desktop.
College now 150k to get a job at a deli.

Anand left anandtech.
 
Last edited:
Swimmer22 said:
3) A skier is accelerating down a 30.0 degree hill at 3.80 m/s^2. What is the vertical component of her acceleration? (b) How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 335?
Click to expand...
And, what is the coefficient of friction between the skiis and snow?
 
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