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.

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

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.

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.