Rotating liquid surface shape

Through the demonstration device of centrifugal phenomenon, understand centrifugal force. The exhibit consists of four sets of centrifugal phenomenon demonstration devices. The visitor holds the handle and rotates it, and the centrifugal device begins to rotate. The liquid will transform from a horizontal plane into a parabolic or unexpected page shape. This is because the liquid is thrown outward by centrifugal force, but the container wall blocks the liquid's movement. The liquid can only climb up along the container wall, and the liquid inside the device rotates from the horizontal plane into a parabolic or three-dimensional page shape. The spin drying function of washing machines in daily life utilizes the centrifugal force. Target audience: Adolescents aged 6-15 years old. Interactive display device operation instructions (audience experience) 1 The visitor holds the handle and rotates it, causing the centrifugal device to start rotating; 2. Observe the process of liquid transforming from a horizontal plane to a parabolic surface and understand the changes caused by the centrifugal force acting on the liquid; 3. Observe others.

Interaction type: Interactive installation. The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

Centrifugal force is an inertial force in a rotating reference frame. For a reference frame that rotates at an angular velocity, the distance between an object and the axis of rotation is r, and the mass is m. The magnitude of the centrifugal force acting on the object can be expressed by the formula F=m ω 2r, which is radially away from the center of the axis and outward. Due to the inertia of objects, attempting to maintain their tendency to move in a straight line results in centrifugal force. Centrifugal force is a virtual force introduced to solve the application problem of Newton's laws in non inertial frames. Originally, Newton's laws did not apply to non inertial reference frames. We introduced inertial centrifugal force in non inertial reference frames, so that formally Newton's second law still applies in non inertial frames. This helps to calculate the application of Newton's laws in non inertial frames. There is no centrifugal force in the inertial reference frame. In real life, centrifugal phenomena are widely present, such as passenger sensation when a car turns.