Question

please help!!!!! Flossy ‘Foo Foo’ Fanelli reaches a speed of 350 km/h from rest in 6.2 s in her dragster. If the car is 800 kg and generates a driving force of 16 000 N, find the force of friction
acting on the car.

Answer 1

$$ma=m\frac{\Delta v}{\Delta t}=F-F_f$$

$$800\frac{350}{6.2\cdot 3.6}=16000-F_f$$

$$F_f=3500\ N$$