As a box is pushed 30 meters across a horizontal floor by a constant horizontal force of 25 newtons, the ki- netic energy of the box increases by 300 joules. how much total internal energy is produced during this process?
1. 150j
2.250j
3. 450j
4. 750j

The internal energy produced during this process is 450 J.

Option C

Explanation:

We know, that work done to perform a displacement will be equal to the change in the kinetic energy as per work energy theorem. Also the work done on that object can be determined by the product of force with displacement.

As the force here is applied in horizontal direction with magnitude of 25N. And with this force, the box got displaced by 30 m.  So,

But, according to work energy theorem, the workdone should be equaled to the variation in kinetic energy. While here, the kinetic energy has been found to change as 300 J in positive side.

So, the variation in kinetic energy is not matching with the work done to displace the box. Hence, it can be concluded that the difference in work done and modified kinetic energy will be giving the total internal energy of the box. Thus,

answer: a ball

explanation: because it will bounce

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation: