Question

a train increase its speed steadily from 10m/s to20m/s in one min
a）what is its avrage velocity during this time in m/s
b）hiw does it travel while increasing its
speed

Answer 1

Answer:

15 m/s

Explanation:

steadily increasing = uniform acceleration

a) u = 10m/s ; v = 20m/s

v(avg) = (u + v)/2 { for uniform acce...}

v(avg) = (10+20)/2 = 15

b) the train is in uniform accelerated motion