Velocity against time

[Gughanath]

Hi...I done a question on velocity-time...I just wanted to amke sure if I am right......the question is: A soldier shoots a bullet vertically into the air at 450 m s^-1. How long does it take for bullet to reach maximum hight...air resistance can be ignored....so I used v=u+at, my final answer was 45 seconds..am I right...please reply anyone :uhh:

[Diane_]

Assuming you're using 10 m/s^2 for g, yes.

[Gokul43201]

I second that. You're doing okay.

[Gughanath]

Thanks a lot.

[Danwins]

dude i just did that same question for hw but i got 46s cos i used -9.81m/s2 for acceleration :D