Answer:
15.88m/s
Explanation:
At the top of the roller coaster you will have three forces acting on the roller-coaster. See the image below. Fc is the centripetal force (for an object in circular motion), Fg is the gravitational force, and Fn is the normal force. To achieve the minimum speed we assume the roller-coaster is barely touching the vertical loop and so the normal force is zero. This leaves two acting forces.

Answer:
D. The direction of the force will change and it will point to regions of lower potential energy.
Explanation:
Direction will change because now you will have the opposite charge. It will still move to the lower potential because of the law of conservation of energy.
Mass is indirectly proportional to acceleration, so, lighter the object greater would be it's acceleration...
A) 0.10 kg is lightest among them, so it's your answer
It is called a conclusion
Answer:
i dont know but help me by marking me the brainliest
Explanation: