An 1800kg car is traveling on an elevated roadway 5.0 meters above the ground. If the car is moving at 20 m/s, what is the total mechanical energy of the system?

Question

Physics

Jaylen Gomez

16 September, 11:11

An 1800kg car is traveling on an elevated roadway 5.0 meters above the ground. If the car is moving at 20 m/s, what is the total mechanical energy of the system?

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Answers (1)

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Emmanuel Thomas · Answer 1

We know that:

EM=Ek+Epg

SO:

Ek=1/2mv²

Ek=1/2 (1800kg) (20m/s) ²

Ek=360000J

Now:

Epg=mgh

Epg = (1800kg) (9,81m/s²) (5m)

Epg=88290J

We sum:

EM=360000J+88290J

EM=448290J