3 years ago

What is an example of cultural change due to technology?

Physics

1 answer:

Nitella [24]3 years ago

8 0

The correct answer to your question here is D

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The line of action of the force \vec{F}=5\vec{i}-10\vec{j} F =5 i −10 j N passes through the point with coordinates (in meters

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Answer:

$\tau = - 30 \hat k$

Explanation:

Position vector of the point of application of point of application of force is given as

$\vec r = 2\hat i + 2\hat j$

now we have have force

$\vec F = 5 \hat i - 10\hat j$

now the moment of force is given as

$\tau = \vec r \times \vec F$

$\tau = (2\hat i + 2\hat j) \times (5\hat i - 10\hat j)$

$\tau = -20\hat k - 10 \hat k$

$\tau = - 30 \hat k$

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A box is pushed horizontally with constant speed across a rough horizontal surface. Which of the following must be true?

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