Question

a 1000 kg car traveling at 30 m/s suddenly stops in 5 seconds. how much force was used to stop the car?

Answer 1

force*time=mass*changeinVelocity

Answer 2

so... F*5+-30*1000 which equals 6000??

Answer 3

no.

force= 30*1000/5, oh, yes, 6000N