Question

A train starts at rest travels 30m N after 20m. The trains stop after traveling 10m more S in 5min

a. What is the d traveled by train?

b. What is the d of the train?

c. What is the speed of the train in m/s?

d. What is the v of the train in m/s?

Answer 1

a) the distance

$$l=l_1+l_2=\rm 30\: m+10\: m=40\: m$$

b) the displacement

$$d=l_1-l_2=\rm 30\: m-10\: m=20\: m \quad North$$

c) the speed

$$v=\frac{l}{t}=\rm \frac{40\: m}{25\: min}=\frac{40\: m}{25\: min}=1.6 \: m/min$$

d) the velocity

$$v=\frac{d}{t}=\rm \frac{20\: m}{25\: min}=0.8\: m/min \quad North$$