What is the speed of the train when it is 175 m from the station? (3 methods to solve)

Answer: Option D

For this question, I will show you 3 methods to solve.

What if the options are not given? The speed and time when the distance is 175 m will be unknown. And based on the basic concepts you learned in speed-time graph, you can form two equations to solve for the unknown speed and time. 1) gradient = acceleration and 2) area under= distance travelled.

Some students asked about using the formula v^2 = u^2 + 2as. Though it is not in the syllabus, you can use it if you know the formula well, though many students just apply blindly.

It is good to use the basic concepts you learned in the syllabus to solve.

View the video

https://youtu.be/9ntc_IQtzro?is=LCfu1e6BUdLWtT97