A spaceship drifts sideways in outer space from point P to p…
A spaceship drifts sideways in outer space from point P to point Q as shown in the figure. The spaceship is subject to no outside forces. Starting at position Q, the spaceship’s engine is turned on and produces a constant thrust (force on the spaceship) at right angles to the line PQ. The constant thrust is maintained until the spaceship reaches another point R in space. As the spaceship moves from Q to R, its speed is