A small robotic spacecraft (m= 145kg) is initially moving in the +x-direction at .150 m/s. Then, its x-axis thruster exerts the following force on the spacecraft:
Fx(t) = -5.00 N during 0s<t<1.5s
-9.00 N during 1.5s< t< 3.25s
-6.00 N during 3.25s <t< 4.00s
When the thruster stops firing at t=4.00s, what is the spacecraft's final velocity?
The Attempt at a Solution
well...don't you have to find the displacement/"?