In addition, after the object is put on the conveyor belt, it moves backward relative to the conveyor belt, so it is affected by the load Why is it said that when an object is put on the conveyor belt, it moves backward relative to the conveyor belt, so it moves forward due to the sliding friction given by the conveyor belt?

In addition, after the object is put on the conveyor belt, it moves backward relative to the conveyor belt, so it is affected by the load Why is it said that when an object is put on the conveyor belt, it moves backward relative to the conveyor belt, so it moves forward due to the sliding friction given by the conveyor belt?

The object on the horizontal conveyor belt is subject to gravity and the supporting force of the conveyor belt. When the object does not reach the same speed as the conveyor belt, it is subject to friction in the opposite direction of relative motion of the conveyor belt. When the object reaches a uniform speed, it is not subject to friction

Motion properties of objects on conveyor belt and problems needing attention
How is v object < V belt uniform deceleration? How to analyze?

In the same direction: V Object > V belt decelerates evenly
V object = V belt uniform velocity
When v object is less than V belt, the speed of uniform deceleration is the same as that of conveyor belt (if the conveyor belt is long enough)
When the direction is opposite: the object decelerates evenly until zero, and finally the speed is the same as that of the conveyor belt
The final result when the conveyor belt is not long enough
Physics is not so easy to learn, come on!

When an object is placed on a horizontal conveyor belt and moves forward with the conveyor belt at a constant speed, does the conveyor belt work on people in this process?
If we just put the block on the conveyor belt, that is to say, the process of the block from static to constant speed. How does the conveyor belt work for people? What about people to the conveyor belt?

Have you done any work for people?
It's an object, right,
The friction force on the object is 0, and there is no relative movement trend between the object and the conveyor belt,
So the conveyor belt doesn't work on the object,
Just put the block on the conveyor belt, because the speed of the object is 0. The speed of the conveyor belt is not 0
They have relative motion, so there is friction and the object accelerates
So the work done by the conveyor belt on the object is equal to the increment of the kinetic energy of the object
Objects do negative work on the conveyor belt

If the belt pulley of the conveyor belt rotates counterclockwise to make the conveyor belt move along with it, as shown in the figure, and then the block is placed at point P to slide down freely, then ()
A. The block will still fall at Q. B. the block will fall to the left of Q. C. the block will fall to the right of Q. D. the block may not fall to the ground

When the block slides down from the smooth surface, according to the law of conservation of mechanical energy, it is known that the speed of the block sliding to point B is the same twice, that is, the initial speed of the uniform deceleration linear motion on the conveyor belt is the same. When the horizontal conveyor belt is stationary and rotates in the counterclockwise direction, the object is subject to the same sliding friction and makes the uniform deceleration linear motion. According to Newton's second law, it is known that the block is uniform deceleration According to the kinematic formula V2 − V20 = 2aX, if the acceleration of the linear motion is the same, when the block slides off the conveyor belt, the displacement of the two passes is the same. According to the kinematic formula V2 − V20 = 2aX, if the speed of the block sliding off the conveyor belt is the same, the initial speed of the horizontal throwing motion is the same, so the block will still fall at the Q point