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oksian1 [2.3K]
3 years ago
15

How much work is done against gravity when lifting a 2-kg sack of groceries a distance of 2.5 meters?

Physics
1 answer:
Crazy boy [7]3 years ago
8 0
W = F x d/x = (m x Ag) x h, therefore, mass (2kg x 9.8) x 2.5m = 49J
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How to calculate motion​
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Answer:

Distnace per unit time

Explanation:

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An electron is accelerated from rest by a potential difference of (24.5 A) V for a distance of (4.50 B) cm. Determine the de Bro
DiKsa [7]

Answer:

206 pm

Explanation:

We are given that

Potential difference,\Delta V=24.5+A V

Distance,d=4.5+B cm

We have to determine the de Brogile wavelength of the electron.

A=11 and B=5

\Delta V=24.5+11=35.5 V

d=4.5+5=9.5 cm

Charge on electron,q =1.6\times 10^{-19} C

Mass of electron=m=9.1\times 10^{-31} kg

Speed of electron,v=\sqrt{\frac{2q\Delta V}{m}}

Using the formula

v=\sqrt{\frac{2\times 1.6\times 10^{-19}\times 35.5}{9.1\times 10^{-31}}

v=3.53\times 10^6 m/s

de Brogile wavelength, \lambda=\frac{h}{mv}

Where h=6.626\times 10^{-34}

\lambda=\frac{6.626\times 10^{-34}}{9.1\times 10^{-31}\times 3.53\times 10^6}=2.06\times 10^{-10}=206\times 10^{-12} m

1 pm=10^{-12} m

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3 years ago
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A 150 N force acts on an object for five seconds in changes the objects velocity by 30 m/s. What is the mass of the object?
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F=ma

150 N= ma

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List 3 ways that living creatures use proteins
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3 ways would be they are used for movement, form structure and carry out reactions, processes, and cells
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Burka [1]

The actual mechanical advantage, the velocity ratio, and the length of the slope if the height of the slope is mathematically given as

  • A=20
  • VR=0.05
  • x=20m

<h3>What are the actual mechanical advantage, the velocity ratio, and the length of the slope if the height of the slope is 10 m?</h3>

Question Parameters:

A block of weight 5000 N is pushed up a slope by a force of 250 N.

Generally, the equation for the actual mechanical advantage  is mathematically given as

A=Fout/Fin

A=5000/250

A=20

b)

the velocity ratio is given by the distance moved by the effort divided by the distance moved by the load

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c)

the length of the slope if the height of the slope is 10 m

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Hence

sin 30=10/x

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Read more about Motion

brainly.com/question/605631

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