Vector Addition: Calculating Bird's Speed in Southerly Direction

AI Thread Summary
To calculate the bird's resultant speed in the southerly direction, vector addition is used, considering both the bird's speed in still air (50 km/h) and the eastward wind (30 km/h). The correct approach involves applying the Pythagorean theorem to combine these vectors. The resultant speed is not simply the bird's speed, as the wind affects its trajectory. The final calculation shows that the bird's effective speed in the south is approximately 43.6 km/h. Understanding vector components is crucial for accurate results in such scenarios.
cixelsyD
Messages
2
Reaction score
0
A bird can manage 50 KmHr-1 in still air. There is a wind blowing eastward at 30kmhr-1, the bird wishes to travel south. The resultant speed the bird carries in the southerly direction is?



For equations i just used vector addition, and pythagorous (A2+B2=C2)



The first time i thought about this problem, i assumed the speed stayed the same, and the bird just got blown of coarse this is in correct though. So i did vector addition, which is obviously wrong as I had to include the southern speed (50kmHr-1).
 
Physics news on Phys.org
Vector addition is correct. What vectors are involved, though? One is the air velocity. What other vectors?

Cheers -- sylas
 
Hello..

For some reason I come up with 20km/hr.

Bye.
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Back
Top