Question

A bullet train is moving on a velocity of 180km/h and it takes 5sec to stop after brakes are applied .find the force exerted by the wheels of train if its mass with the wagon is 2000kg

Answer 1

here is your answer

given :

initial velocity (u) = 180 km/hr = 180*(5/18) = 50 m/s

final velocity (v) = 0

time taken (t) = 5 seconds

mass (m) = 2000kg

to find : force exerted

solution :

by using first equation of motion

v = u+at

0 = 50+5a

5a = -50

a = -50/5

a = -10 m/s²

now,

force = mass*acceleration

force = 2000*(-10)

force = -20000 Newton

so, the force exerted will be -20000 Newton

Answer 2

Answer:

Check the attachment!!