PLS HELP WITH THIS

[jerome]

A train starts from rest from a station and travels with uniform acceleration 0.5m/s^2 for 20s. it travels with uniform velocity for another 30s, the brakes are then applied so that a uniform retardation is obtained and the train comes to rest in a further 10s. sketch the velocity-time graph of this motion. Using your graph, calculate the total distance travelled by the train

 

 

Please include explanations...thanks.

[EdEarl]

We don't do homework for people. If you want help, please at least try to do the problem for yourself.

[ewmon]

So, first of all, they want a velocity-time graph.

 

The first part involves acceleration and time, so what's the equation that relates velocity and acceleration and time?

The uniform-velocity-and-time part should be fairly obvious by itself.

The last part involving uniform retardation (braking) sounds similar to the first part.

 

Try solving each part, and get back to us.

[Mozart]

Study things within your range, google stuffs and do not make this site your first port of call when given assignments. Struggle on your own first before posting.