Question

A train accelerates from rest to a speed $v$ in time $t$. What is the acceleration of a boy sitting in the train as seen from his father sitting on the opposite seat?

• A. $\frac{v}{t}$
• B. $\frac{-v}{t}$
• C. 0.0
• D. $\frac{2v}{t}$

Answer 1

The correct option is C 0.0

The boy and the father are both sitting in the same train. Hence, the father will observe the boy to be at rest. Hence, his velocity and acceleration both are zero.