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lisov135 [29]
3 years ago
6

A rock with a mass of 1000 kg falls to the earth. what would the force be?

Physics
1 answer:
andrew11 [14]3 years ago
3 0
F=ma = 1000kg * 9.8 m/s^2 = 9800 N
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find the angle between two forces of magnitude 27N and 30N if the magnitude of the resultant of the two force is 8N​
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Answer:

The angle between two forces is 165 degrees.

Explanation:

We have,

Force 1, F_1=27\ N

Force 2, F_2=30\ N

Resultant of two forces, F = 8 N

It is required to find the angle between two forces. The resultant of two force is given by the formula as follows :

F=\sqrt{F_1^2+F_2^2+2F_1F_2\cos\theta}

\theta is the angle between F₁ and F₂

So,

F^2=F_1^2+F_2^2+2F_1F_2\cos\theta\\\\\cos\theta=\dfrac{F^2-F_1^2-F_2^2}{2F_1F_2}\\\\\cos\theta=\dfrac{(8)^2-(27)^2-(30)^2}{2\times 27\times 30}\\\\\cos\theta=-0.966\\\\\theta=\cos^{-1}\left(-0.966\right)=165^{\circ}

So, the angle between two forces is 165 degrees.

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3 years ago
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nikdorinn [45]
<span>A. Kinetic energy will be converted into electric potential energy if the stationary particle is positive.</span>
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If an object moves 40 m north, 40 m west, 40 m south, and 40 m east, what's the total displacement?
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Choice 'D' describes speed in the metric units 'meter' and 'second'.
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