Is it possible to add a vector quantity to a scalor quantity ?

a scalar quantity is a quantity which has magnitude only but no direction. for example, distance, speed etc. it is impossible to add the two together because of their different dimensions . this basically means that being a vector quantity a particular physical quantity will have both magnitude and direction

explanation:

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer