Answer:
nail will stop after traveling 1000 m
Explanation:
We have given mass m = 50 gram = 0.05 kg
Frictional force which is used to stop the mass F = 62.5 kN
Initial velocity is given u = 50 m/sec
From newton's law force is equal to F = ma, here m is mass and a is acceleration
So
As finally nail stops so final velocity v = 0 m/sec
From third equation of motion
So
s = 1000 m
So nail will stop after traveling 1000 m