Helicopter Velocity in Relation to Ground with Wind

AI Thread Summary
To determine the helicopter's velocity relative to the ground, the airspeed of 55 m/s at 35 degrees N of W must be combined with the wind velocities. For part (a), with a wind velocity of 21 m/s [E], vector addition is necessary to find the resultant ground velocity. In part (b), the wind velocity of 21 m/s [22 degrees W of N] requires a similar approach, involving trigonometric calculations. The discussion highlights the urgency for assistance in solving these vector problems, emphasizing the need for quick calculations. Overall, the thread seeks help with complex vector addition involving helicopter and wind velocities.
F.B
Messages
81
Reaction score
0
I really need help with these questions they are too hard.

Anyways the question is:

A helicopter travels with an air speed of 55 m/s. The helicopter heads in the direction [35 degrees N of W]. What is velocity relative to the ground if the wind velocity is (a) 21 m/s [E] and (b) 21 m/s [22 degrees W of N]?

I need to converst the speeds to velocity but i don't have time to convert them to displacements. So can anyone please help me?
 
Physics news on Phys.org
I figure it should take you about 10 minutes if you do it by hand, 5 if you use a calculator. Since that amount of time has already passed, it's clear that it is too late for me to help you!
 
Ummm i have all day to wait for an answer
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top