Answered

IDNStudy.com, ang iyong destinasyon para sa mga maaasahang sagot. Ang aming platform ng tanong at sagot ay idinisenyo upang magbigay ng mabilis at eksaktong sagot sa lahat ng iyong mga tanong.

in a scene from a movie or superman, he was shown running after a train. the train moves at 54 m/s. how much work must he do to stop the train if the mass of the train is 425000 kg?

Sagot :

Glendzmoralesidn

Answer:

The work to stop the train is 6.197 x 10⁸ J.

Explanation:

Here, we are to solve for the work to stop a train. We are to connect work with a given mass and velocity.

To solve this, we are to use the work-energy principle. Since there is a net force of work doing on the train, the kinetic energy of the moving train will be equal to work done.

Therefore. we will be using the formula:

W = ΔKE

W = KE₂ - KE₁

W = (¹/₂mv²)₂ - (¹/₂mv²)₁

where

W     is the work done on the train

m     is the mass of the train

v       is the velocity of the train

KE₂  is the final kinetic energy

KE₁   is the initial kinetic energy

For the given information

v = 54 m/s

m = 425,000 kg

W = ?

Solving the problem

So, let us solve for the work done on the train by using the work-energy formula.

Here, let us assume that the initial kinetic is zero.

W = ΔKE

W = KE₂ - KE₁

W = (¹/₂mv²)₂ - (¹/₂mv²)₁

Substitute the given information, we have:

W = ¹/₂(425000 kg)(54 m/s)²

W = 619,650,000 J   or

W = 6.197 x 10⁸ J

Therefore, the work done on the train to stop it is 6.197 x 10⁸ J.

To learn more about this topic, just click on the following links:

  • Relationship of work, energy and power

        https://brainly.ph/question/160947

  • Additional example with solution and answer

        https://brainly.ph/question/2267052

#LetsStudy

Ang iyong presensya ay mahalaga sa amin. Magpatuloy sa pagtatanong at pagbibigay ng mga sagot. Sama-sama tayong magtutulungan upang makamit ang mas mataas na antas ng karunungan. Salamat sa pagbisita sa IDNStudy.com. Nandito kami upang magbigay ng malinaw at tumpak na mga sagot.