Calculating Energy Required to Accelerate a Ferrari from 14km/h to 25km/h

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Homework Help Overview

The discussion revolves around calculating the energy required to accelerate a Ferrari from 14 km/h to 25 km/h, specifically under the condition of no friction. The subject area includes concepts of energy, force, and acceleration in physics.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants explore the initial and final energy states of the vehicle, questioning the uniformity of acceleration and discussing the implications of friction on the calculations.

Discussion Status

The conversation is ongoing, with participants clarifying the problem's assumptions and exploring different aspects of the energy calculation. Some guidance has been offered regarding the energy states at different speeds, but no consensus has been reached.

Contextual Notes

The original poster's calculations and assumptions are under scrutiny, particularly the lack of mention of uniform acceleration in the problem statement.

jeahomgrajan
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Homework Statement


If there is no friction, how much energy is needed to acccelerate a 1500kg ferrrari from 14km/h to 25km/h


Homework Equations



P=(F)(Vav)

The Attempt at a Solution


14km/h+25km/h / 2 = 19.5km/h

F=(g)(m)
F=9.8*1500
14700N
 
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Let's start from the top. Does the question say uniformally accelerated?
 
NO it doesn't mention that
 
Hi jeahomgrajan! :smile:
jeahomgrajan said:
If there is no friction, how much energy is needed to acccelerate a 1500kg ferrrari from 14km/h to 25km/h

In other words:

What is the energy at 14km/h?
What is it at 25km/h?
What is the difference? :smile:
 
thanks
 

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