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PLS HELP WITH THIS


jerome

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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.

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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.

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  • 2 weeks later...

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