A bus is moving with constant velocity. Suddenly the bus stops. Passengers will tend to move.BackwardForwardUnaffectedRise upward

When a bus is moving with constant velocity and suddenly stops, the passengers inside will exhibit a tendency to continue moving in the direction they were previously traveling. This phenomenon can be explained through Newton's First Law of Motion, which states that an object in motion will remain in motion at a constant velocity unless acted upon by a net external force.

Analyzing the Options:

1. Backward: This would imply that the passengers are moving opposite to the direction of the bus's travel, which is not the case when the bus comes to a sudden stop; they continue in the direction of travel initially.

2. Forward: This option is the most accurate, as passengers will tend to lurch forward due to their inertia, wanting to keep moving in the direction the bus was previously traveling.

3. Unaffected: This is incorrect because the sudden stop of the bus certainly affects the passengers due to their inertia.

4. Rise upward: There is no basis for passengers rising upward as a result of the bus stopping; their motion is horizontal.

Conclusion

The most logical answer is Forward. Passengers will tend to move forward when the bus suddenly stops due to the principle of inertia.