question 1\nif we know an object is moving at constant velocity, we may assume\nthe net force acting on the…

question 1\nif we know an object is moving at constant velocity, we may assume\nthe net force acting on the object is zero.\nthere are no forces acting on the object.\nthe object is accelerating.\nthe object is losing mass.\nquestion 2\na physics student is riding on a train traveling north. having read about inertia, the student performs an experiment with a golf ball. he reaches over the aisle and drops the ball from rest. instead of hitting the floor directly below the students hand, it hits to the north, i.e. forward of that position. which of the following might be the cause for this to happen?\nthe train is moving at constant velocity.\nthe train is speeding up.\nthe train is slowing down.\nwhatever the cause, it cannot be any of the answers given.

question 1\nif we know an object is moving at constant velocity, we may assume\nthe net force acting on the object is zero.\nthere are no forces acting on the object.\nthe object is accelerating.\nthe object is losing mass.\nquestion 2\na physics student is riding on a train traveling north. having read about inertia, the student performs an experiment with a golf ball. he reaches over the aisle and drops the ball from rest. instead of hitting the floor directly below the students hand, it hits to the north, i.e. forward of that position. which of the following might be the cause for this to happen?\nthe train is moving at constant velocity.\nthe train is speeding up.\nthe train is slowing down.\nwhatever the cause, it cannot be any of the answers given.

Answer

Brief Explanations:

For Question 1, according to Newton's first - law, an object moving at constant velocity has a net force of zero acting on it. There can be forces acting on it, but they balance out. Acceleration is zero for constant velocity, and there is no indication of mass change. For Question 2, when the train is slowing down while moving north, the golf ball, due to inertia, will continue to move with the initial velocity it had when dropped and will move forward (north) relative to the position directly below the hand as the train's velocity decreases.

Answer:

Question 1: the net force acting on the object is zero Question 2: The train is slowing down