Question

A space shuttle requires solid rocket boosters to be lifted into orbit in lower space. At certain altitude, the boosters are separated from the liquid fuel tank and the fuel outputs are cut off. if the separation occurs at 45 km above sea level and upward is the positive direction, what is the VELOCITY of the boosters immediately before they strike the ocean surface?

Answer 1

@zepdrix please help me :D

Answer 2

@thomaster

Answer 3

@Abhisar

Answer 4

Hello @BestRivenNA !

Answer 5

hi

Answer 6

Have you tried it urself ?

Answer 7

ya

Answer 8

i thought that the problem didnt have enough information

Answer 9

It has given you !

Answer 10

ummmm given me??

Answer 11

Do you know the principal of conservation of mechanical energy ?

Answer 12

nope

Answer 13

Then chuck it !

Answer 14

...

Answer 15

uhh sure

Answer 16

\(\color{blue}{\text{Originally Posted by}}\) @Abhisar
Do you know Newton's Second Equation of motion ?
\(\color{blue}{\text{End of Quote}}\)

Answer 17

S=ut + 1/2at^2 ?

Answer 18

i dont know what s and u stand for

Answer 19

No u will have to use third equation of motion,

\(\sf v^2=u^2+2as\)
V= final velocity, u=initial velocity, s=distance, a=acceleration.

Answer 20

oh yeah i know that one

Answer 21

Since, the boosters are falling from 45km
Take
S=4500 m
u=0
a=9.8

and find the value of v

Answer 22

but how do you find the acceleration without being given the velocity?

Answer 23

@Abhisar help pls :D

Answer 24

??

Answer 25

acceleration due to gravity is fixed. It's value is 9.8 m/s^2

Answer 26

ohhhhhhhhh yeah thanks!

Answer 27

u got the answers ?

Answer 28

and do you know why u=0 ?

Answer 29

well i got 297 m/s

Answer 30

uhh and yeah i dont really know why u=0

Answer 31

\(\color{blue}{\text{Originally Posted by}}\) @BestRivenNA
well i got 297 m/s \(\huge\checkmark\)
\(\color{blue}{\text{End of Quote}}\)

Answer 32

Whenever something `Freely Falls` under gravity or is `Dropped`, the initial velocity u=0

Answer 33

ok thanks for your AWESOME help!

Answer 34

\(\color{red}{\huge\bigstar}\huge\text{You're Most Welcome! }\color{red}\bigstar\)
\(~~~~~~~~~~~~~~~~~~~~~~~~~~~\color{green}{\huge\ddot\smile}\color{blue}{\huge\ddot\smile}\color{pink}{\huge\ddot\smile}\color{red}{\huge\ddot\smile}\color{yellow}{\huge\ddot\smile}\)

Answer 35

lol