A marble rolls along a track and eventually drops into a shallow cup. If friction and air resistance are not considered, when does the ball experience balanced forces during the route?

Question

1.Locations 1, 6, and 8
2.Locations 2, 5, and 7
3,Locations 3, 4, and 6
4.Locations 1, 4, and 8

Answer 1

2. Locations 2, 5, and 7

At location 2, the marble experiences a downward force due to gravity and an equal upward force from the track, making the forces balanced. At location 5, the marble is at the peak of a hill and experiences a balanced force for a brief moment. Finally, at location 7, the marble is at the bottom of a hill and experiences a balanced force as it comes to a stop before dropping into the cup.