Net force=mass*acceleration
2300E-600E=900*a
solve for acceleration a.
vf=a*t
d=1/2 a t^2
Work=force*distance=2300*d
KEcar=1/2 m vf^2
Friction=600*d
rate power loss=friction work/8
2. A force of 2300 N [E] acts on a 900 kg car for 8 s. At the same time a friction force of 600 N [W] acts. What will the final speed of the car be? How far will it have travelled? How much work was done by the accelerating force? What is the kinetic energy of the car? How much energy was lost to friction? What was the rate of power loss to friction?
I have the answers however i have no idea how to derive them, or even where to start. Please help!
Thank You!
1 answer