# Velocity or Acceleration?

Anonymous

### Question Description

A train from rest is now travelling at the speed of 350km/hr, What is the time travelled if the train has reached 170km? What is the train acceleration as it travelled the 170km?

Besides from that question i tried using the velocity formula t=d/v and d=v*t having the result .48hr and 729.17km/hr2

then when i use the acceleration formula of a=((vf-vi)/2)t i got an answer t=.97hr and a= 360.82

which of the two should i use and why?

This question has not been answered.

Create a free account to get help with this and any other question!

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors