Question

A bottle is given a push along a frictionless tabletop and slides off the edge of the table. (Which answer best fits the following questions?)

1. What forces are exerted on the bottle while it is being pushed?

A.) The bottle is exerted by the gravity force and the normal force applied by the table.

B.) The bottle is exerted by the gravity force, the normal force applied by the table and the push parallel to the tabletop.

C.)The bottle is exerted by only the push parallel to the tabletop. 2. What forces are exerted on the bottle while it is on the table, but free of the push ? A.) There is no force exerting on the bottle. B.) The bottle is exerted by only the gravity force. C.) The bottle is exerted by the gravity force and the normal force applied by the table. 3. What forces are exerted on the bottle while it is falling from the table to the floor? A.) The bottle is exerted by only the gravity force. B.) There is no force exerting on the bottle. 4.What is the reaction force to the push ? A.) The reaction force is the bottle pulling upward on the earth. B.) The reaction force is the bottle pushing on the hand that pushes the bottle. C.) The reaction force is the bottle pushing down on the tabletop. 5. What is the reaction force to to the normal force applied by the table on the bottle? A.) The reaction force is the bottle pulling upward on the earth. B.) The reaction force is the bottle pushing on the hand that pushes the bottle. C.) The reaction force is the bottle pushing down on the tabletop. 6. What is the reaction force to the force exerted by the gravity force ? A.) The reaction force is the bottle pulling upward on the earth. B.) The reaction force is the bottle pushing on the hand that pushes the bottle. C.) There is no reaction here.

Answer 1

Answer 1:

B) While the bottle is being pushed,3 forces act on it:

1) gravity ( because it is a universal force)

2) normal reaction exerted by the table-top (so as to balance the gravitational force)

3) Push , parallel to the table-top ( this force is responsible for causing the acceleration)

Answer 2:

C) When the bottle is free of the push, only 2 forces are acting-

1) gravity ( because it is universal force)

2) normal reaction exerted by the table-top (so as to balance the gravitational force)

Answer 3:

A) When the bottle is falling from the table, only one force would be acting.

1) gravity ( because it is universal force)

Note: here, there wouldn't be any reaction because the bottle is not supported by anything

Answer 4:

B) The reaction force to the push is the bottle pushing the hand that pushes the bottle.( According to Newton's third law: every action has an equal and opposite reaction.)

Answer 5:

C) The reaction force to the Normal force applied by the table on the bottle is the bottle pushing down on the table, that is gravity force. (According to Newton's third law: every action has an equal and opposite reaction.)

Answer 6:

A) The reaction force to the gravity force is the bottle pulling upward on the earth, that is, the normal force. ( Actually the normal reaction force can also be termed as pull exerted by the bottle on the table )