2 years ago

What is speed in your own words

Physics

2 answers:

KatRina [158]2 years ago

6 0

Answer:

speed is defined as distance travelled per unit time

KatRina [158]2 years ago

3 0

Answer: Speed is the measure of how fast an object is moving.

Explanation: Speed is expressed as the ratio of the distance travelled per unit time.

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B. is the answer.

C is not correct because the light is actually reflected off of an opaque object.

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A car goes from 0 to 26.8 m/s in 6.2 s. What is the average acceleration of the car?

Nutka1998 [239]

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Explanation:

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The gravitational force of a star on an orbiting planet 1 is f1. planet 2, which is three times as massive as planet 1 and orbit

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Let us consider two bodies having masses m and m' respectively.

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As per the Newtons law of gravitation ,the gravitational force between two bodies is given as - $F = G\frac{mm'}{r^{2} }$ where G is the gravitational force constant.

From the above we see that F ∝ mm' and $F\alpha \frac{1}{r^{2} }$

Let the orbital radius of planet A is $r_{1}$ = r and mass of planet is $m_{1}$ .

Let the mass of central star is m .

Hence the gravitational force for planet A is $f_{1} =G \frac{m_{1}*m }{r^{2} }$

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Hence the gravitational force $f_{2} =G\frac{m m_{2} }{r^{2} }$

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$= \frac{3}{4} G\frac{mm_{1} }{r_{1} ^{2} }$

Hence the ratio is $\frac{f_{2} }{f_{1} } = \frac{\frac{3}{4}G mm_{1/r_{1} ^2} }{Gmm_{1}/r_{1} ^2 }$

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Read 2 more answers

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I need more details like r u reading from something

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A 6.0-kilogram cart initially traveling at 4.0 meters per second east accelerates uniformly at 0.50 meter per second squared eas

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Answer: 5.5m/s

Explanation:

vf=vi+at

vf= 4.0m/s + (0.50m/s^2)(3.0s)

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2 years ago