At t = 0, a particle is located at x = 25 m and has a velocity of 15 m/s in the positive x direction.What is the velocity of the particle at t = 5.0 s? [Hint: Find the equation of the line and integrate it]
2007-09-12 15:37:50 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
With no acceleration or deceleration ...
it's still going 15 m/s.
2007-09-12 15:46:40 · answer #1 · answered by cpuguy_1 4 · 0⤊ 0⤋
You can write:
x = 1/2at^2 + v0t +x0
v = v0 + at
Only the second equation is a straight line. Now a is acceleration and also the slope of teh line in the second equation. But you need 2 pieces of data to v. The straight line equation has x0 and v0. Integrating the equation gives you the first but now you need more info. In short, unless a = 0 you can't uniquely predict the velcoity of the particle without some further data.
2007-09-12 22:52:48 · answer #2 · answered by nyphdinmd 7 · 0⤊ 0⤋