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3 years ago

9

The diagram below shows the velocity vectors for two cars that are moving relative to each other.

1 answer:

scoundrel [369]3 years ago

7 0

Answer:

The answer is " $5 \ \frac{m}{s} \ west$ "

Explanation:

$\to \vec{V_1} = (25 \frac{m}{s}) (\hat{-i})\\\\\to \vec{V_2} = (20 \frac{m}{s}) (\hat{-i})\\\\$

velocity of car | respect to car :

$\to \vec{V_{12}} = \vec{V_1} - \vec{V_2}\\\\$

$=\vec{-25} \hat{i}+ \vec{20} \hat{i}\\\\= 5 \ \frac{m}{s} \ west$

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Describe the role of the teacher and the learner in a natural science and technology classroom

dem82 [27]

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3 years ago

A skier halfway between the top and bottom of a hill. Which statement best describes the skier?

Dvinal [7]

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3 years ago

A high power line carries a current of 1.0 kA. What is the strength of the magnetic field this line produces at the ground, 10 m

solmaris [256]

Answer:

The strength of the magnetic field that the line produces is $2x10^{-5} Tesla$ .

Explanation:

From Biot-Savart law, the equation to determine the strength of the magnetic field for any straight wire can be deduced:

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Notice that it is necessary to express the current, I, from kiloampere to ampere.

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3 years ago

A seagull flies at a velocity of 9.00 m/s straight into the wind. (a) if it takes the bird 20.0 min to travel 6.00 km relative t

enot [183]

Here we will the speed of seagull which is v = 9 m/s

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now in part a)

if effect of wind is in opposite direction then it travels 6 km in 20 min

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now since effect of wind is in opposite direction then we can say

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Part b)

now if bird travels in the same direction of wind then we will have

$v_{net}= v_{bird} + v_{wind}$

$v_{net} = 9 + 4 = 13 m/s$

now we can find the time to go back

$time = \frac{distance}{speed}$

$time = \frac{6000}{13}$

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Part c)

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$T = t_1 + t_2$

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4 0

3 years ago

You are standing on a street corner with your friend. You then travel 14.0 m due west across the street and into your apartment

Margarita [4]

Answer:

Explanation:

We shall express each displacement vectorially , i for each unit displacement towards east , j for northward displacement and k for vertical displacement .

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D = - 8 i + 12 j + 22 k

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= √ ( 64 + 144 + 484 )

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3 years ago