Question

The initial speed of a body is 2.43 m/s. What is its speed after 3.07 s if it accelerates
uniformly at 3.23 m/s2? Answer in units of m/s.

What is its speed after 3.07 s if it accelerates uniformly at −3.23 m/s2?
Answer in units of m/s.

Answer 1

a. V = Vo + a*t = 2.43 + 3.23*3.07 =

b. V = Vo + a*t = 2.43 + (-3.23)3.07 = -

Answer 2

I solved a and got it right but B doesn't work? I got -7.4861 which tells me its incorrect when I submit the answer.

Answer 3

same thing happened to me