Physics simple harmonic vibration in senior two.

If it is spherical, it is simple harmonic motion (similar to a simple pendulum)

Force analysis:

The gravity (sliding force is effect force) and displacement on the inclined plane cannot satisfy F=-kx.

Note that it is on the inclined plane.

I'm exhausted, so I can't get more points.

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middle school

2. simple harmonic motion

(1) Definition: The motion of an object under the action of restoring force which is proportional to the displacement and always points to the equilibrium position is called simple harmonic motion.

(2) Condition: The condition for the object to do simple harmonic vibration is F=-kx, that is, the restoring force f on the object is proportional to the displacement, and the direction is opposite to the displacement direction.

(3) Understanding of F=-kx: For general simple harmonic motion, k is a proportional constant, and different simple harmonic motion has different values. K is a physical quantity determined by the structure of the vibration system itself, and in the spring vibrator, K is the stiffness coefficient of the spring.

3. Characteristics of simple harmonic motion

(1) restoring force: The magnitude and direction of restoring force change periodically during the reciprocating motion of an object. When the object is in the maximum displacement, the restoring force is the largest, and when the object is in the equilibrium position, the restoring force is the smallest (zero). When an object passes through an equilibrium position, the direction of the restoring force changes.

(2) Acceleration: According to the instantaneous correspondence between force and acceleration, the acceleration generated by restoring force also changes periodically, and the pace of change is the same as that of restoring force.

(3) Displacement: When an object is in simple harmonic vibration, its displacement (magnitude and direction) also changes periodically. In order to study the problem conveniently, the starting point of the displacement in the equilibrium position is selected. When the object passes through the equilibrium position, the direction of the displacement changes.

(4) Speed: Simple harmonic vibration is a motion with variable acceleration, and the change of speed also has periodicity (including magnitude and direction). When the object passes through the equilibrium position, the speed is the maximum, and the speed of the object is zero at the maximum displacement.

By definition.