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annan65
19.08.2019 •
Mathematics
Awater skier is pulled behind a boat by a rope. the rope has a tension of 290 n and is at an angle of 33 degrees. what is the x component of the tension?
a. 192 n
b. 215 n
c. 243 n
d. 158 n
Solved
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Ответ:
Draw the rope at an angle of 33 degrees from the x axis.
You will find:
cosx = a/h
cos33 = a/290
a. = 243.21
Ответ:
The speed rate of the plane in still air is 1006.67 km/h
The speed rate of the wind is 246.67 km/h
Step-by-step explanation:
To answer the question, we let the speed of the plane in still air = x km/h
Let the speed of the wind = y km/h
Therefore,
4560/(x - y) = 6 hours and
3720/(x + y) = 3 hours
4560 = 6·x - 6·y.........(1)
3720 = 3·x + 3·y ........(2)
Multiplying equation (2) by 2 and add to (1) gives
12080 = 12·x
x = 12080/12 =
km/h
Substituting the value of x in (1) gives
4560 = 6040 - 6·y
6·y = 1480
y = 1480/6 =![246\frac{2}{3}](/tpl/images/0607/6772/6c776.png)
The speed rate of the plane in still air = 1006.67 km/h
The speed rate of the wind = 246.67 km/h.