Question

multiple select question
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voyager 1 is a space probe launched by nasa in 1977 and is the farthest human-made object. it experiences negligible gravity. voyager 1 is propelled by thrusters but will run out of fuel by 2040. what will happen to voyager 1 after this date?
voyager 1 will continue moving with the speed it will have when the fuel runs out.
voyager 1 will immediately stop.
voyager 1 will slow down from the velocity it will have when the fuel runs out.
the velocity of voyager 1 will remain unchanged.

Explanation:

This relies on Newton's first law of motion (inertia): an object in motion stays in motion with constant velocity if no net external force acts on it. The problem states Voyager 1 experiences negligible gravity, and after fuel runs out, no thrust force acts on it. So its speed and velocity (direction + speed) will stay constant.

Answer:

Voyager 1 will continue moving with the speed it will have when the fuel runs out.
The velocity of Voyager 1 will remain unchanged.