Question

After a displacement of 17 m, a train on a straight track is at the position xf = –2.5 m

Answer 1

-19.5m

-19.5+17=-2.5m

Answer 2

Answer:

$x_i = -19.5 m$

Explanation:

As we know that the displacement is defined as the change in the position.

So we will have

$displacement = x_f - x_i$

here we know that

displacement = 17 m

initial position = ?

final position is given as

$x_f = -2.5 m$

so we have

$(-2.5 m) - x_i = 17 m$

$x_i = -2.5 - 17$

$x_i = -19.5 m$