Question

A train is moving 35 m/s to the east. It speeds up to 42 m/s east over the

course of 40 seconds. What was the train's acceleration?
O A. 0.175 m/s2 west
O B. 5.71 m/s2 east
O C. 5.71 m/s2 west
O D. 0.175 m/s2 east

Answer 1

0.175 m/s2 east

Step-by-step explanation:

when train is moving on a constant acceleration we can use motion equation to solve this,

V = U + at

v = final velocity

u = initial velocity

a = acceleration

t = time taken

42 = 35 + a×40

a = 0.175 m/s²