A train starting from rest attained a velocity of 20m/s² in 4s. it continued with velocity attained for the next 16s and was finally brought to rest in another 5s. sketch the velocity time graph of the motion. use your graph to evaluate 1: acceleration of the train
2: total distance travelled
3: average speed of the train​

this allows people to make the best decision or pursue the best option. when alternatives are weighed using their advantages and disadvantages, the option whose disadvantages outweigh the advantages (based on a qualitative or quantitative analysis) are shunned while those whose advantages outweigh their disadvantages are pursued.  

grav forces affect all objects magnetic forces affect magnetic objects and electric currents