Work and Power of 1.83x10^3 kg Car Accelerating from Rest

[PepeF.]

Homework Statement

a 1.83x10^3 kg car accelerates uniformly from rest to 13.6m/s in 2.81 s

-what is the work done on the car in this time inerval?

-what is the power delivered by the engine in thsi time interval?

Homework Equations

w=f*d
p=w/t

The Attempt at a Solution

i did the first one, but could not be able to come up with the answer
i multiplied gravity x mass = f then fxd=246568 and its wrong
can you please explain or tell me how to get it

 

[jdwood983]

Homework Statement

a 1.83x10^3 kg car accelerates uniformly from rest to 13.6m/s in 2.81 s

-what is the work done on the car in this time inerval?

-what is the power delivered by the engine in thsi time interval?

Homework Equations

w=f*d
p=w/t

The Attempt at a Solution

i did the first one, but could not be able to come up with the answer
i multiplied gravity x mass = f then fxd=246568 and its wrong
can you please explain or tell me how to get it

Because your acceleration is not gravity, it is the acceleration that is implied in the problem:

<br /> a=\frac{v_f-v_0}{t}=\frac{13.6m/s-0m/s}{2.81s}=4.84m/s^2<br />