Recent content by jmartella

Alright, I retried doing the problem. For part (b), instead of putting .0021, I put .00206, and it gave me credit for the problem. Using that time value instead of the first one, all the rest of the answers were correct. Thanks for you help though, I hope you didn't get as frustrated as I did.

Oh, okay. Yes, I see what you're saying. The number is right, but yes, the units should be in seconds. I talked it over with a friend of mine who took AP Physics last year, and he agreed with me that the time that was yielded from setting a(t)=0 is the amount of time the bullet was in the...

I didn't put 0 in as the value for t, I made the function equal to 0, because I believe that the problem stated that the acceleration of the bullet was 0, but I'm not exactly sure. Actually, reading over the problem again, it's asking for the amount of time that the bullet was accelerated, so I...

Oh, sorry, I forgot to adjust it in the given information. v(t) = -5.95*10^7*t^2 + 2.45*10^5*t

Homework Statement The speed of a bullet as it travels down the barrel of a rifle toward the opening is given by v = (-5.95 multiplied by 107) t 2 + (2.45 multiplied by 105) t, where v is in meters per second and t is in seconds. The acceleration of the bullet just as it leaves the barrel is...