Help maths question 😭😭

The train leaves station A from rest with a constant acceleration of 0.2ms^-2 it reaches its maximum speed after 2mins maintains this speed for 4min then slows down to stop at station B with acceleration 1.5ms^-2. Calculate the distance from A to B.

Reply 1

Notnek

21

Original post by Salimaaaa

The train leaves station A from rest with a constant acceleration of 0.2ms^-2 it reaches its maximum speed after 2mins maintains this speed for 4min then slows down to stop at station B with acceleration 1.5ms^-2. Calculate the distance from A to B.

Have you tried anything? Where are you stuck?

Reply 2

username5961053

OP

5

Original post by Notnek

Have you tried anything? Where are you stuck?

With the whole question tbh I don’t know where to start

Reply 3

Notnek

21

Original post by Salimaaaa

With the whole question tbh I don’t know where to start

Try drawing a speed-time graph.

Reply 4

username5961053

OP

5

Distance is area under the graph so what would u do

Original post by Notnek

Try drawing a speed-time graph.

Reply 5

username5961053

OP

5

Original post by cregsim

Is that a real task

Idk it’s a question

Reply 6

Notnek

21

Original post by Salimaaaa

Distance is area under the graph so what would u do

You need a speed-time graph, not an acceleration-time graph.

So for the first stage of the journey, if the train accelerates for 2 mins (120 seconds) at 0.2m/s^2, what speed does it reach? Label that on the y-axis.

Then you need to find the area under the graph like you said, which is just the area of a trapezium.

(Alternatively you could do this whole question just with SUVAT but a common approach to something like this is to use a speed-time graph.)

Help maths question 😭😭

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