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2 years ago

A box is against a wall. A person pushes on the box, but the box does not move. Is this

Physics

2 answers:

Serhud [2]2 years ago

7 0

Answer:

it is a force

Explanation:

a force is a push or a pull

Levart [38]2 years ago

4 0

Answer:

Yes, this is an example of a force because a force is a push or pull

Explanation:

Since the person is adding force to push the box.

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A spring on a horizontal surface can be stretched and held 0.2 m from its equilibrium position with a force of 16 N. a. How much

nekit [7.7K]

Answer:

a $W_{3.5} = 490 \ J$

b $W_{2.5} = 250 \ J$

Explanation:

Generally the force constant is mathematically represented as

$k = \frac{F}{x}$

substituting values given in the question

=> $k = \frac{16}{0.2}$

=> $k = 80 \ N /m$

Generally the workdone in stretching the spring 3.5 m is mathematically represented as

$W_{3.5} = \frac{1}{2} * k * (3.5)^2$

=> $W_{3.5} = \frac{1}{2} * 80 * (3.5)^2$

=> $W_{3.5} = 490 \ J$

Generally the workdone in compressing the spring 2.5 m is mathematically represented as

$W_{2.5} = \frac{1}{2} * k * (2.5)^2$

=> $W_{2.5} = \frac{1}{2} * 80 * (2.5)^2$

=> $W_{2.5} = 250 \ J$

5 0

3 years ago

Can someone please help me?? i’ll give brainilist

Ksivusya [100]

Probably 90 j but im not sure I haven’t done any work like this in a while

7 0

3 years ago

As temperature increase what energy increases

garik1379 [7]

Kinetic energy would increase sir.

8 0

3 years ago

What are the main ideas of physical science

Mademuasel [1]

Hysical science is defined as the study of observable phenomena in the universe.

the main idea of physical science is known as the "scientific method". 

this method states: 

observe a "real" ( not imaginary ) phenomena. 

make a hypothesis ( or theory / idea ) that EXPLAINS this phenomena. 

conduct a real experiment to test this hyothesis. 

confirm that the experiment validates the original hypothesis and if necessary amend the theory. 

it has worked so well that the very communication you are having with me is a result of the wonders of physical science.

3 0

3 years ago

If a quasar is moving away from us at v/c = 0.8, what is the measured redshift?

Delicious77 [7]

Answer:

The measured redshift is z =2

Explanation:

Since the object is traveling near light speed, since v/c = 0.8, then we have to use a redshift formula for relativistic speeds.

$z= \sqrt{\cfrac{c+v}{c-v}}-1$