Answer:
Compasses are mainly used in navigation to find direction on the earth. This works because the Earth itself has a magnetic field which is similar to that of a bar magnet (see the picture below). The compass needle aligns with the Earth's magnetic field direction and points north-south.
For any object to move at a constant velocity, the net force acting on the object must be ZERO.
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It’s gonna have to b since it’s decreasing
