Originally Posted by **oz93666** You have subtracted the two numbers ,not sure why....
Adding them 99.6+13.824 gives the answer of 113 ...
But you haven't supplied the full question so I can't give a definitive answer. |

The full question is:

Find the displacement of a vehicle that achieves a velocity of 112km/h [W], accelerating at 2.7m/s^2 [W] for 3.2 seconds.

The lesson text uses the equation:

d = V2(t) - 1/2(a)(t^2)

and they get the answer 113m [W].

If that is correct, how do I get that number? I understand it's a simple minus and plus issue, but how come the minus doesn't seem to apply? Or am I missing something?

Thanks again, I appreciate your help.