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2 years ago

Emmett is lifting a box vertically. Which forces are necessary for calculating the total force?

1 answer:

4 0

Hello there i hope you are having a good day :) Question : Emmett is lifting a box vertically. Which forces are necessary for calculating the total force?

So Firstly when lifting a box you would need to be vertically and you would need to added to calculate the total forces that its gravitational force, tension force and also air resistance force.

Hopefully this helps you.

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2 years ago

A frog hops 5m east and 2m north. What is the magnitude of the frogs total displacement in m?

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As per the question a frog jumps 5 m towards east.

Frog again jumps 2 m north.

Let the displacement along east is denoted by vector A and the displacement towards north is denoted as vector B.

Hence magnitude of A = 5 m

Magnitude of B = 2 m

We are asked to calculate the total displacement.

Here the angle between them is 90 degree as A is towards east and B is towards north.

As per parallelogram law of vector addition,the magnitude of total displacement [R] will be-

$R=\sqrt{ A^{2} +B^{2}+2AB\cos\theta}$

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$=\sqrt{25+4+0} m$ [cos90= 0]

$=\sqrt{29} m$

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2 years ago

The thermosphere is characterized by a drastic increase in temperature. What is the reason for this increase? A. absorption of u

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A. absorption of ultraviolet rays from the Sun

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The thermosphere helps protect and regulate Earth's temperature by absorbing much of the UV radiation and X-rays emitted by the Sun. When the Sun is most active, the thermosphere heats up and increases in size, increasing its protective power.

Just like in the oceans, the Earth's atmosphere experiences waves and tides that help move energy within it. The winds and the general circulation of the thermosphere are strong drivers of these tides and waves.

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