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3 years ago

Average speed can be represented by the mathematical expression

Physics

1 answer:

nevsk [136]3 years ago

5 0

Average speed is defined as total distance moved in total interval of time

so it is given as

$v_{avg} = \frac{distance}{time}$

now here is we show distance by "d" and time by"t"

then we will have mathematical expression as follows

$v = \frac{d}{t}$

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His is the geologic process of breaking down rocks into smaller and smaller pieces. There are two main types: chemical and mecha

garik1379 [7]

Answer:

Weathering

Explanation:

The geologic process of breaking down rocks into smaller and smaller units or pieces is known as weathering.

The physical disintegration and chemical decomposition of rocks to form sediments and soils is known as weathering.

The agents of weathering are wind, water and glacier.

Chemical weathering entails the decomposition of rocks.
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Therefore, weathering breaks down rocks.

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2 years ago

Read 2 more answers

Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the dista

Sidana [21]

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Distance = <em>1,800 meters </em>

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2 years ago

A ball attached to a string is whirled around in a horizontal circle having a radius r. If the radius of the circle is changed t

LenKa [72]

Answer:

Option D: Four times the original speed.

Explanation:

A centripetal force accelerates a body by changing the direction of the body's velocity without changing the body's speed.

The speed(v) is therefore constant, thereby making the magnitudes of the of the acceleration and the force constant.

The formula used to calculate the Centripetal force is given below:

$F = \frac{mv^2}{r}$

where F represents the Centripetal force, m represents the mass of the moving body, v represents the speed or velocity at which the body is moving and r represents the radius.

Making the speed the subject of the formula: $v^{2} = \frac{rF}{m} \\$

Therefore, when the radius (r) is changed to 4r, i.e r = 4r

speed(v) becomes $v^2 = \frac{4rF}{m}$

After comparing, the difference between the speeds is Four times the original speed.

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2 years ago

consider the free-body diagram. if you want the box to move, the force applied while dragging must be greater than the

NeTakaya

Answer:

Force of static friction between the two surfaces

Explanation:

When two surfaces come into contact, they exert a force that resist the sliding of the two surfaces. This force is called static friction.

This force is given by the relation

$F_{s}=\mu_{s}\eta$

Where,

μ - coefficient of static friction

η - normal force acting on the body

When a force acts on a body placed on a rough surface, it doesn't do any work if the applied force was less than the force of static friction.

So, in order to move the body, the applied force should be greater than the force of static friction.

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2 years ago

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Novay_Z [31]

Answer:

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2 years ago