Which statement best describes why a machine is useful?

a-a machine does a greater amount of work than the amount of work that is done on it.
b-a machine does a smaller amount of work than the amount of work that is done on it.
c-a machine can decrease both the input force and the input distance needed to do a given amount of work.
d-a machine can decrease either the input force or the input distance needed to do a given amount of work.

It is D) A machine can decrease either the input force or the input distance needed to do a given amount of work, cause I just took the quiz. Good luck on finishing the course!

D-A machine can decrease either the input force or the input distance needed to do a given amount of work.

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