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Zepler [3.9K]
2 years ago
9

Two students try to move a heavy box. One pushes with the force of the 20N while the other pulls with a force of 30N in the same

direction. What is the work done by each boy after 10 seconds if the box can\t be moved? Show your equation.
Physics
1 answer:
hichkok12 [17]2 years ago
6 0

Answer:

Explanation:

Time is not part of the Work equation. That's the only conclusion that you can come to.

Work = Force * distance.

Not enough information is given to go any further. You don't have enough information to calculate the distance.

We don't know if the box can be moved or not. It says heavy. 50 N is really not very much.

I would guess that you are intended to answer that the box didn't move, but it's really hard to tell.

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A meteorologist plans to release a weather balloon from ground level, to be used for high-altitude atmospheric measurements. The
Slav-nsk [51]

Answer:

563.86 N

Explanation:

We know the buoyant force F = weight of air displaced by the balloon.

F = ρgV where ρ = density of air = 1.29 kg/m³, g = acceleration due to gravity = 9.8 m/s² and V = volume of balloon = 4πr/3 (since it is a sphere) where r = radius of balloon = 2.20 m

So, F = ρgV = ρg4πr³/3

substituting the values of the variables into the equation, we have

F =  1.29 kg/m³ × 9.8 m/s² × 4π × (2.20 m)³/3

= 1691.58 N/3

= 563.86 N

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3 years ago
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devlian [24]

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5 0
3 years ago
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Alex Ar [27]

Answer:

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Explanation:

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7 0
2 years ago
Who is responsible for documenting the crime scene in detail and collecting physical
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Answer:

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In the question, Lana wants to find out the kind of birdseed that the neighborhood birds like (to eat) the most by feeding them different types of birdseed and measuring the level of the birdseed in the feeders at regular intervals

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3 0
3 years ago
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