What? where did you get this? It doesn't even have the right units: v is m/sec and mt^2 (which I guess you mean) is in kg sec^2. I think you meant F= ma. And then v= v0+ at.want2learn said:Homework Statement
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?
Homework Equations
v= mt2
No, you don't. It is not asked for and you don't need it to find the velocity, Use F= ma to find a and then use v= v0+ at to find t at the end of each time interval. v0 is the speed at the beginning of each time interval.The Attempt at a Solution
well...don't you have to find the displacement/"?
The final velocity is the speed and direction of an object at the end of a given time period.
Three forces can affect an object's final velocity by either increasing, decreasing, or changing its direction. The net force, which is the sum of all three forces, determines the object's final velocity.
Time can affect an object's final velocity by allowing it to accelerate or decelerate. The longer the time period, the more an object can change its velocity.
Mass can impact an object's final velocity by affecting its inertia. Objects with larger masses require more force to change their velocity compared to objects with smaller masses.
Initial velocity can affect an object's final velocity by either adding to or subtracting from the final velocity. If the initial velocity is in the same direction as the final velocity, it will increase the final velocity. If the initial velocity is in the opposite direction, it will decrease the final velocity.