Energy

[jeahomgrajan]

1. The problem statement, all variables and given/known data
If there is no friction, how much energy is needed to acccelerate a 1500kg ferrrari from 14km/h to 25km/h


2. Relevant equations

P=(F)(Vav)

3. The attempt at a solution
14km/h+25km/h / 2 = 19.5km/h

F=(g)(m)
F=9.8*1500
14700N

[Hootenanny]

Let's start from the top. Does the question say uniformally accelerated?

[jeahomgrajan]

NO it doesnt mention that

[tiny-tim]

Hi jeahomgrajan! :smile:
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:

[jeahomgrajan]

thanks