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Korvikt [17]
2 years ago
10

As a person pushes a box across a floor, the energy from the person's moving arm is transferred to the box, and the box and the

floor become warm. During this process, what happens to energy? It is increased. It is conserved. It is decreased. It is created.​
Physics
1 answer:
In-s [12.5K]2 years ago
4 0

Answer:

It is conserved

Explanation:

Converted to heat energy due to the friction caused by the box rubbing on the floor

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Answer:

Weight (mass) = 16.5 kg

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acceleration =2.6 m/s^2

displacement = 13.2m

now,

acceleration = velocity/ time

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8 0
4 years ago
A pulley system lifts a 1345 n weight a distance of 0.975m. Paul pulls the rope a distance of 3.90m, exerting a force of 375N. A
Rashid [163]

A. IMA: 4

The Ideal Mechanical Advantage (IMA) is given by:

IMA = \frac{d_i}{d_o}

where

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d_o is the output distance

For the pulley system in this problem, d_i = 3.90 m and d_o = 0.975 m, so the IMA is

IMA=\frac{3.90 m}{0.975 m}=4


B. MA: 3.59

The actual mechanical advantage (AMA), or simply the Mechanical Advantage (MA), is given by

MA=\frac{F_o}{F_i}

where F_o is the output force and F_i is the input force. For the pulley system in this problem, F_i = 375 N and F_o = 1345 N, so the MA is

MA=\frac{1345 N}{375 N}=3.59


C. Efficiency: 89.8 %

The efficiency of a machine is equal to the ratio between the MA and the AMA:

\eta = \frac{MA}{AMA} \cdot 100

Therefore, in this case,

\eta=\frac{3.59}{4}\cdot 100=0.898=89.8 \%

3 0
3 years ago
Why are computer simulations useful in studying phenomena in the universe?
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Computer simulation is useful because it helps in the prediction of what will likely happen in the future using data from past events.

<h3>What is computer simulation?</h3>
  • This is the use of computer models to represents a hypothetical scenarios that are likely to be obtained in the real world.

Computer simulations are useful in studying phenomena in the universe because they help us to achieve the followings;

  • It helps in the prediction of what will likely happen in the future using data from past events.
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Learn more about computer simulations here: brainly.com/question/22214039

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noname [10]

Answer:

The wire would stick to the magnet????????????????????????

Explanation:

3 0
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Answer:

A downward sloped line means the object is returning to the starting point.

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