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anastassius [24]
3 years ago
5

Explain me the inertia of rest ?

Physics
1 answer:
sergejj [24]3 years ago
3 0






Hi Pupil Here is Your Answer ::





➡➡➡➡➡➡➡➡➡➡➡➡➡





The tendency of a body to oppose any change in its state of rest is known as inertia of rest.


Example :


1 ) A person standing in a bus Falls backward when the bus suddenly starts moving forward.




Reason》When the bus Moves, the lower part of his party begins to move along with the bus by the upper part of his body continues to remain at rest due to inertia of rest.


That is why, a person Falls backward when the bus suddenly starts.




⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅




Hope this helps . . . . . .
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First we need to define an Frame of reference. Lets put the x axis unit vector \hat{i} pointing east,  with the y axis unit vector \hat{j} pointing south, so the positive angle is south of east. For this, we got for the first force:

\vec{F}_1 = 83.7 \ N \ (-\hat{j}),

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\vec{F}_2 = 59.9 \ N \ (-\hat{i}),

as is pointing west.

Now, our third force will be:

\vec{F}_3  = - 83.7 \ N \ (-\hat{j}) - 59.9 \ N \ (-\hat{i})

\vec{F}_3  =  83.7 \ N \ \hat{j}  + 59.9 \ N \ \hat{i}

\vec{F}_3  =  (59.9 \ N , 83.7 \ N )

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To find the magnitude, we can use the Pythagorean theorem.

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this is the magnitude.

To find the direction, we can use:

\theta = arctan(\frac{F_{3_y}}{F_{3_x}})

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