Question #17e5c

2 Answers
Mar 22, 2017

Answer:

Train B

Explanation:

Let's focus on Train B. Train B's initial velocity is #8m/s# and acceleration is #1m/s^2#. We also have #t=10# We need Train B's final velocity:

Use the equation #a=(vf-vi)/t#

#1=(vf-8)/10#

#10=vf-8#

#vf=18m/s#

#18m/s# is greater than #16m/s# so Train B goes faster.

Mar 26, 2017

Answer:

Train B

Explanation:

Train A's speed is constant so its speed after 10 seconds would be #16 m/s#, but train B which starts at #8 m/s# accelerates at #1 m/s^2#
so after 10 seconds it picks up additional #10 m/s# of speed to #18 m/s#. Hence B will have greater speed.