2.A bus starting with a speed of 12m/s slows down to 6m/s in 3s.The average acceleration of the bus is
solution: Given information: u =12m/s v=6m/s t=3s we have formula: v= u+ at a=v-u/t a=6-12/3 a=-2m/s2 by this answer, we can say the body is in decelarated motion.