Atrain 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

0.175 m/s2 east

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

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )