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shusha [124]
3 years ago
15

jamal wanted only to test the effect of the free fall and so he put his system in a vacuum to prevent air resistance. In free fa

ll, will the crumpled or flat paper reach the ground first?
Physics
2 answers:
Elis [28]3 years ago
8 0

Explanation :

It is given that, Jamal wanted only to test the effect of the free fall and so he put his system in a vacuum to prevent air resistance.

Vacuum is also called as free space. In a vacuum there is no air resistance. We know that the air resistance depends on surface area.

But in the vacuum there is is no resistive force. So, in free fall both crumpled or flat paper will reach the ground at the same time.

Alborosie3 years ago
6 0

Both papers will reach the ground at the same time. CORRECT ANSWER

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Pls how to solve this problem. help would be appreciated ​
Bingel [31]

Answer:

80 m/s

Explanation:

Given:

a = -5 m/s²

v = 0 m/s

Δx = 640 m

Find: v₀

v² = v₀² + 2a(x − x₀)

(0 m/s)² = v₀² + 2(-5 m/s²) (640 m)

v₀ = 80 m/s

7 0
3 years ago
The aeroplane lands at a speed of 80 m/s
strojnjashka [21]

The mass of the aeroplane is 300,000 kg.

<h3>What is Newton's second law of motion?</h3>

It states that the force F is directly proportional to the acceleration a of the body and its mass.

The law is represented as

F =ma

where acceleration a = velocity change v / time interval t

Given is the aeroplane lands at a speed of 80 m/s. After landing, the aeroplane takes 28 s to decelerate to a speed of 10 m/s. The mean resultant force on the aeroplane as it decelerates is 750 000 N.

The force expression will be

F = mv/t

Substitute the values and we have

750000 = m x  (80 -10)/ 28

750,000 = m x 2.5

m = 300,000 kg

Thus, the mass of the aeroplane is 300,000 kg.

Learn more about Newton's second law of motion.

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8 0
2 years ago
Which of the following phrases best describes a physical model?
Shtirlitz [24]

Answer:

option D

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3 0
3 years ago
A chamber fitted with a piston contains 1.90 mol of an ideal gas. Part A The piston is slowly moved to decrease the chamber volu
yarga [219]

Answer:

The work done is 5136.88 J.

Explanation:

Given that,

n = 1.90 mol

Temperature = 296 K

If the initial volume is V then the final volume will be V/3.

We need to calculate the work done

Using formula of work done

W=nRT\ ln(\dfrac{V_{f}}{V_{i}})

Put the value into the formula

W=1.90\times8.314\times296\ ln(\dfrac{\dfrac{V}{3}}{V})

W=1.90\times8.314\times296\ ln(\dfrac{1}{3})

W=−5136.88\ J

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Hence, The work done is 5136.88 J.

5 0
3 years ago
A friend frequently misses the morning
poizon [28]

Answer: Heyaa! ~

State of the problem is that your friend routinely misses the school bus.

Explanation:

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Hopefully this helps you!

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2 years ago
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