A small submarine of mass 1000 kg sinks in water with a uniform speed of 2 m/s. What is the resultant force exerted on the submarine as it sinks?
Correct answer: A. 0 N
- A. 0 N
- B. 500 N
- C. 2000 N
- D. 10000 N
Explanation
When an object moves with a uniform speed, it implies there is no acceleration. According to Newton's First Law of Motion, the net force acting on an object with no acceleration is zero. The submarine experiences forces such as gravity and buoyancy, but these forces are balanced, resulting in a net force of 0 N. Options B, C, and D suggest non-zero resultant forces, which would imply that the submarine is accelerating, which contradicts the condition of moving at a constant speed.
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