SRL Archive - Science

A plane is flying 200 M/S at 20 degress incline, it drops a package and it took 46 seconds for it to hit the ground.
Assume no air fricition and acceleration is at 9.8m/s.
what was the distance of the plane when it dropped the package?

I got 7k

Yup, 7221.81m.

yess

From: Boreas
Yup, 7221.81m.

You must of divided by zero.


I got 8993. :S

http://www.wolframalpha.com/input/?i=sin%2820%29*200*46%2B%28-9.8*46*46%2F2%29

What did you use?

I got 1969.3.. ;D

7k was right
1/3 of my class though it was moving north 20 degrees as in moving at west then turn north 20 degrees, the other 1/3 though that "falling" only started to count when the velocity is negative (towards the ground) and the other 1/3 though about it the way i did.

From: i luffs yeww
I got 1969.3.. ;D

Did you google it or something? You need to use radians
sin(20*pi/180)*200*46+(-9.8*46*46/2)

or use wolframalpha which notices that 20 radians is a lot, and so assumes degrees for you

From: Boreas
Did you google it or something? You need to use radians
sin(20*pi/180)*200*46+(-9.8*46*46/2)

or use wolframalpha which notices that 20 radians is a lot, and so assumes degrees for you

:p it's the same thing (if I had the units it'd be, anyway). I was just saying that because I wanted to look smart like you, but you already gave the answer. ^^

Bonus points for distance between plane and package at packages peak, and height of plane when package hits ground, white text spoilers



238.730…
10368.4

I'll hand it in tommor mr boreas:)