Question

A train is moving at a velocity of 25m s power -1 it is a brought to rest by applying the brakes which produce a uniform retardation of 0.5 m s e power minus to calculate the velocity of the train after 10

Answer 1

Answer:

v = 20 m/s after t = 10 sec

Step-by-step explanation:

A train is moving at a velocity of 25m s power -1 it is a brought to rest by applying the brakes which produce a uniform retardation of 0.5 m s e power minus to calculate the velocity of the train after 10

V = u + at

a = - 0.5 m/s² ( retardation is - ve acceleration)

u = initial speed = 25 m/s

v = velocity at tine t

v at 10 sec

v = 25 - (0.5)10

v = 25 - 5

v = 20 m/s

time taken to bring into rest

v = 0 at rest

0 = 25 - (0.5)t

=> t = 25/0.5

=> t = 50 sec

50 sec time taken to bring it at rest