Question

as the shuttle bus comes to a sudden stop to avoid hitting a dog, it accelerates uniformly at -4.1 m/s to the 2nd power as it slows from 9.0m/s to 0.0 m/s. find the time interval of acccelaration for the bus

Answer 1

u=initial velocity
v=final velocity
a=acceleration
v=u+at
solve for t (watch out for sign of a)