Nop, the direction of the Normal forces is the same before and after, and also the ##\Delta x## is downwards in one case and horizontal in the other. From where you can see that ##\vec{F}\cdot d\vec{r}=0## as we said before.t2r said:The direction of the Normal forces is changed, and also the Δx is not downwards because the angular velocity.
Am I right ?
The conservation of energy is a fundamental law in physics that states that energy cannot be created or destroyed, only transferred or converted from one form to another.
Normal forces, also known as contact forces, are perpendicular forces that act between two surfaces in contact. In some situations, such as when an object is at rest on a horizontal surface, the normal force is equal and opposite to the force of gravity, resulting in a net force of zero.
The conservation of energy is related to normal forces being zero because when there is no net force acting on an object, the total energy of the object remains constant. In the case of an object at rest on a horizontal surface, the normal force and force of gravity cancel out, resulting in no change in the object's energy.
No, normal forces are not always zero. They can vary depending on the situation. For example, if an object is on an inclined plane, the normal force will be less than the force of gravity, resulting in a net force that causes the object to slide down the plane.
The conservation of energy applies to all real-life situations involving energy. For example, when a ball is thrown into the air, its potential energy decreases as it rises, but this is offset by an increase in kinetic energy. When the ball reaches its highest point, its potential energy is at its maximum, but its kinetic energy is zero. As the ball falls back to the ground, its potential energy decreases again while its kinetic energy increases. The total energy of the ball remains constant throughout the entire process, in accordance with the law of conservation of energy.