- #1

Balsam

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## Homework Statement

A Grand Prix race car accelerates to twice the speed of the car in sample problem 1, in the same amount of time. Calculate the ratio of the power needed by the Grand Prix car to the power needed by the car in sample problem 1.

Given: initial speed of car=0m/s,

final speed of car in sample problem 1=22.7m/s, so speed of Grand Prix car will be 2(22.7)=55.6m/s,

time=7.7s

h=0, so there's no gravitational potential energy, only kinetic energy.

power in sample problem 1=55kW=55000W

## Homework Equations

W=ΔE

_{g}=1/2mv

_{f}^2-1/2mv

_{i}^2,

After finding W, use P=W/t to solve for power and then write what the ratio between the power is

## The Attempt at a Solution

I don't know how to solve this because we're not given the mass of the Grand Prix car. I can't think of a way to solve this problem.