a car of mass 900 kg moves at 10 m/s.what is the braking force required to stopthe car in a time of 5 seconds

Question

turingtest · Answer

$$F=ma=m\frac{\Delta v}{\Delta t}$$where m is mass, v is velocity, and t is time.
Delta (the triangle, if you don;t know it) represents a change in the variable next to it.
Plug in and solve for F

anonymous · Answer

huh?

turingtest · Answer

how much does the velocity change?
that is Delta v
how much does the time change?
that is Delta t
what are those two numbers?

anonymous · Answer

dont know

turingtest · Answer

Delta v is how much the velocity changed.
It says we went from 10m/s to rest (0m/s).
so Delta v is 10
what about Delta t? how much time did it take for that to happen?