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2 years ago

A ball is thrown vertically upwards with a velocity

Physics

1 answer:

zhuklara [117]2 years ago

6 0

Answer:

Explanation:

The acceleration of gravity is 9.8m/s^2.

So to calculate the time it will take to make the ball stop(which btw means the ball now reach its greatest height), use the formula V1=V0+at. V1 is the final velocity(which is 0), V0 is the starting velocity(which is 30m/s), and the a(cceleration) is 9.8m/s^2.

(You can ignore the fact "at" is -30 instead 30, it's because the directions two velocity travel are opposite. )

We can now know the time it takes to make the ball stop just by the gravitational force is about 3 sec.

Use another formula S=1/2at^2, to find out the S(height) is 1/2*9.8*3^2=44.1, which is approximately D.45m .

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It takes you 8.3 min to walk with an average velocity of 1.6 m/s to the north from the bus stop to the museum entrance. How far

Anarel [89]

solution:

1.6 m/s = 96 m/min (in other words, 1.6 m/s x 60 s/min)

96 m/min x 8.3 min = 796.8 m

$s=ut +\frac{1}{2}at^2\\there is no accleration mentioned so,\\s= uv\\8.3\times60=498(s)\\510\times1.6=816(m)$

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3 years ago

How many electrons does a neutral atom of the element iron (fe) have?

borishaifa [10]

Answer:

26 electrons

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Explanation:

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2 years ago

If the velocity of gas molecules is doubled, then it’s kinetic energy will?( hint formula for kinetic energy is KE=.5 x mv2)

eduard

Answer:

D quadruple

Explanation:

$E = \frac{1}{2}mv^2\\E'=\frac{1}{2}m(2v)^2=\frac{1}{2}m4 v^2 = 4(\frac{1}{2}mv^2)=4E$

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3 years ago

Read 2 more answers

Ramon and sally are observing a toy car speed up as it goes around a circular track. ramon says, "the car's speeding up, so ther

Anestetic [448]

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3 years ago

If the mass of a material is 49 grams and the volume of the material is 10 cm^3, what would the density of the material be?

Irina-Kira [14]

Answer: 4.9 g/cm^3

Explanation.

!) Data

mass = 49 g
Volume = 10 cm^3

2) Formula

Density = mass / volume

Density = 49 g / 10cm^3 = 4.9 g/cm^3

This is a problem where you only need to know the formula and subtitute the numbers to calculate.

The formula of density is the very same definition: mass per unit of volume.

So, as you had the mass and the volume you just need to plug the values in the formula density = mass / volume.

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2 years ago