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2 years ago

7

Find the magnitude and angle of a vector given the components: Bx = 7, By=-5

1 answer:

Arte-miy333 [17]2 years ago

3 0

Answer:

$|B| = \sqrt{ {B _{x} }^{2} + {B _{y} }^{2} } \\ = \sqrt{ {7}^{2} + {5}^{2} } \\ = \sqrt{74} \\ = 8.6$

$let \: the \: angle \: be \: \theta \\ \tan(\theta) = \frac{B _{y} }{B _{x} } \\ \tan( \theta) = \frac{ - 5}{7} \\ \theta = { \tan }^{ - 1} ( \frac{ - 5}{7} ) \\ = 35.5 \degree$

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The speed of the toy when it hits the ground is 2.97 m/s.

The given parameters;

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the maximum height reached by the, h = 0.45 m

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P.E = K.E

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Substitute the given values and solve the speed;

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2 years ago

In which electric circuit would the voltmeter read 10 volts ?

ki77a [65]

Given that,

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Using ohm's law

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Put the value into the formula

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2 years ago

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Answer:

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1 year ago