Flashlight to the Rescue, you are the sole crew member of the interplanetary spaceship T: 1339 Vorga, which makes regular cargo runs between the earth and the mining colonies in the asteroid belt You are working outside the ship one day while at a distance of 2.0 AU from the sun. [1 AU (astronomical unit) is the average distance from the earth to the sun, 149,600,000 km.]
Unfortunately, you lose contact with the ship's hull and begin to drift away into space. You use your spacesuit's rockets to try to push yourself back toward the ship, but they run out of fuel and stop working before you can return to the ship. You find yourself in an awkward position floating 16.0 m from the spaceship with zero velocity relative to it. Fortunately, you are carrying a 200-W flashlight. You turn on the flashlight and use its beam as a "light rocket" to push yourself back toward the ship.
(a) If you, your spacesuit, and the flashlight have a combined mass of 150 kg, how long will it take you to get back to the ship?
(b) Is there another way you could use the flashlight to accomplish the same job of returning you to the ship?