Table of Contents
- 1 What kind of force kept the water inside the cup How would you describe the direction of the force is the direction of acceleration the same as the force?
- 2 What are the forces that acts on an object?
- 3 Why does water stay in a cup when you spin it?
- 4 What forces are acting on the cup?
- 5 What does Newton’s third law mean?
- 6 Why does a coin drop into a cup?
- 7 How does centripetal force affect a spinning cup?
- 8 Why does water stay in a spinning cup?
What kind of force kept the water inside the cup How would you describe the direction of the force is the direction of acceleration the same as the force?
Nonetheless, it is accelerating due to its change in direction. The direction of the acceleration is inwards and the object feels a net force pointing towards the center of teh circle. The net force is an inward or “centripetal force”.
What are the forces that acts on an object?
A force is a push or pull acting upon an object as a result of its interaction with another object….Types of Forces.
| Contact Forces | Action-at-a-Distance Forces |
|---|---|
| Frictional Force | Gravitational Force |
| Tension Force | Electrical Force |
| Normal Force | Magnetic Force |
| Air Resistance Force |
Did you observe water coming out or spilling while the cup is spinning?
If you fill a cup with water and tie it to a string, you can spin the cup around in a horizontal or vertical circle. As long as you spin it fast enough, the water will not spill out!
Why does water stay in a cup when you spin it?
Quick Physics: This is an example of centripetal (circular) motion. The water stays in the bucket because of inertia. The water wants to fly off from the circle, but the bucket gets in the way and keeps it in place.
What forces are acting on the cup?
The cup is acted on by two forces. Gravity pulls it downwards and the upward contact force from the table pushes upwards. These two forces add to zero and the result is a cup in equilibrium.
How do you identify forces?
But for other objects, we can identify the forces present by drawing free-body diagrams. These are force vector diagrams that provide a visual representation of an object and the forces acting on it. When drawing free-body diagrams, each force is represented by an arrow (a vector).
What does Newton’s third law mean?
law of action and reaction
Newton’s third law states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction. The third law is also known as the law of action and reaction. For example, a book resting on a table applies a downward force equal to its weight on the table.
Why does a coin drop into a cup?
The coin will drop into the cup. The coin has inertia, meaning it really wants to stay in one place. If you move the card slowly, it isn’t fast enough to overcome that force. If you flick it quickly, the coin stays in one place and then drops into the cup.
What kind of motion does a water Cup have?
This demo is scary at first, but with practice can become second nature. In simplest terms, the water cup is undergoing uniform circular motion. Uniform circular motion can be described as the motion of an object in a circle at a constant speed. As an object moves in a circle, it is constantly changing its direction.
How does centripetal force affect a spinning cup?
Yet, with the inward net force directed perpendicular to the velocity vector, the object is always changing its direction and undergoing an inward acceleration. To relate to the demo, as the water spins around, the centripetal force pushes the cup inward to the center of the circle and the water does not have time to accelerate downward.
Why does water stay in a spinning cup?
“Alright all good Ideas (stops spinning) Alright well the reason the water stays in the cup is what’s called centripetal force. All of you guys have experienced that same force in some way.”