gatheredjam6
Badges: 8
Rep:
?
#1
Report Thread starter 1 week ago
#1
For the question below, I have already got the answer 1.73 ms-2 but I got 1.76 ms-2. Can somebody please explain the method to solve this question? Thanks.
https://drive.google.com/file/d/1amR...ZBAYf8cp8/view
0
reply
user342
Badges: 11
Rep:
?
#2
Report 1 week ago
#2
Could you just screenshot it and post that instead?
0
reply
gatheredjam6
Badges: 8
Rep:
?
#3
Report Thread starter 1 week ago
#3
(Original post by user342)
Could you just screenshot it and post that instead?
Can you not see the picture?
0
reply
user342
Badges: 11
Rep:
?
#4
Report 1 week ago
#4
(Original post by gatheredjam6)
Can you not see the picture?
I have to request access
0
reply
gatheredjam6
Badges: 8
Rep:
?
#5
Report Thread starter 1 week ago
#5
(Original post by gatheredjam6)
Can you not see the picture?
Name:  IMG_20210223_192649.jpg
Views: 4
Size:  100.7 KB
1
reply
user342
Badges: 11
Rep:
?
#6
Report 1 week ago
#6
(Original post by gatheredjam6)
Name:  IMG_20210223_192649.jpg
Views: 4
Size:  100.7 KB
Draw a free body diagram and turn the thrust into its vertical and horizontal components. Figure out the weight of the helicopter (although I thought that would have been the 19kN, maybe I've misunderstood the question?) then the mass. Label the vertical thrust and use trig to work out the horizontal force of the thrust. Then u should know an equation to figure out the acceleration
0
reply
gatheredjam6
Badges: 8
Rep:
?
#7
Report Thread starter 1 week ago
#7
(Original post by user342)
Draw a free body diagram and turn the thrust into its vertical and horizontal components. Figure out the weight of the helicopter (although I thought that would have been the 19kN, maybe I've misunderstood the question?) then the mass. Label the vertical thrust and use trig to work out the horizontal force of the thrust. Then u should know an equation to figure out the acceleration
Yeh I did all of that. 19/cos(10)= 19.29.... (19.3 to 1dp).
Then I did 19.29... x sin(10)=3.35.... kN
F/M=A 3350.2..../1900kg (assuming this is the mass)=1.76ms-2

But the answer in the book is 1.73 ms-2 which confused me.
0
reply
user342
Badges: 11
Rep:
?
#8
Report 1 week ago
#8
Use 9.81 for g not 10. So you would get mass as 1936.799...kg not 1900.
0
reply
gatheredjam6
Badges: 8
Rep:
?
#9
Report Thread starter 1 week ago
#9
(Original post by user342)
Use 9.81 for g not 10. So you would get mass as 1936.799...kg not 1900.
OK thanks. In GCSE's we used 10 as the gravitational force. Thanks.
0
reply
user342
Badges: 11
Rep:
?
#10
Report 1 week ago
#10
(Original post by gatheredjam6)
OK thanks. In GCSE's we used 10 as the gravitational force. Thanks.
No problem, I kept forgetting too when I started y12.
0
reply
gatheredjam6
Badges: 8
Rep:
?
#11
Report Thread starter 1 week ago
#11
Yeh but I'm still in Yr 11 so I didn't even know you had to do that
0
reply
user342
Badges: 11
Rep:
?
#12
Report 1 week ago
#12
Wow well done! Feel free to message me or make another post if you have any more questions you're stuck on or don't understand
0
reply
gatheredjam6
Badges: 8
Rep:
?
#13
Report Thread starter 1 week ago
#13
(Original post by user342)
Wow well done! Feel free to message me or make another post if you have any more questions you're stuck on or don't understand
Ok thanks
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

How are you feeling being back in school?

Happy (44)
23.28%
Unhappy (53)
28.04%
Conflicted (92)
48.68%

Watched Threads

View All