How Do You Calculate Final Speed and Net Force in Physics?

[ndavid126]

Homework Statement

Part 1. A 2.25 × 10^3 kg car requires 5.8 kJ of work to move from rest to some final speed. During this time, the car moves 29.8 m.
Neglecting friction, find a) the final speed. Answer in units of m/s

Part 2.
b.)the net horizontal force exerted on the car. Answer in units of N

Homework Equations

For Part 1. I did 5800j=1/2mv^2 plugged in and got 2.2705848, which is correct
For Part 2 I guess it would be W=fdcos?

The Attempt at a Solution

For Part 1. I did 5800j=1/2mv^2 plugged in and got 2.2705848, which is correct
For part 2 I did 5800=fdcos but i am confused on what they mean by saying net.

 

[wukunlin]

net force just means the vector sum of forces when different forces are applied to an object