Question

find the average resistance required to stop a car of mass 500kg in a distanceof 25m if the initial speed is 20m/s​

Answer 1

it may be your answer

Answer 2

F (resistance required) = m*a

By newton's laws of motion,

v^2-u^2=2as

0-400=2*a*25

a=-400/50

⇒a=-8m/s^2

Resistance required to stop the car will be

F=m*a

F=500*8

F=4000N ← Resistance required