Question

A railway car of mass 20 tonnes moves with an initial speed of 54km/hr. On applying brakes, a constant negative acceleration of 0.3m/s2 is produced. (i) What is the breaking force acting on the car? (ii) In what time it will stop? (iii) What distance will be covered by the car before if finally stops?

Answer 1

force= -6000 N
time= 50 sec
distance= 375 m