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

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To calculate the energy required to accelerate a 1500 kg Ferrari from 14 km/h to 25 km/h without friction, the kinetic energy at each speed must be determined. The average speed during acceleration is 19.5 km/h. The force acting on the car is calculated using F = mg, resulting in 14,700 N. The energy difference between the two speeds provides the total energy needed for the acceleration. The discussion emphasizes the importance of understanding kinetic energy and the absence of friction in the calculation.
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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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