What is the force exerted on a car and driver during acceleration?

[Brittykitty]

A 950 kg car starts from rest and reaches a velocity of 50.0 km/h in 8.50 s. If the driver has a mass of 75.0 kg, what force is exerted on the car and driver during this time interval?

I am very confused on this question. I was thinking:

950kg+750.kg=1025
50.0/3.6 =13.88 +8.5 = 22.38s

1025/22.38 ... but obviously all of that is wrong seeing as how it doesn't give me any of answers I can choose from :( help! what am i doing wrong

 

[PhanthomJay]

A 950 kg car starts from rest and reaches a velocity of 50.0 km/h in 8.50 s. If the driver has a mass of 75.0 kg, what force is exerted on the car and driver during this time interval?

I am very confused on this question. I was thinking:

950kg+750.kg=1025

the mass of the car and driver is 1025 kg, OK

50.0/3.6 =13.88

please watch your units, 13.88 m/s is the velocity of the car after 8.5 seconds, then its acceleration is v/t, not v + t, and

1025/22.38

Where does this this formula come from? Please write out your relevant equations.