A small ball fell from the air onto a spring placed vertically on the ground and asked what would happen to the state of the ball How does the acceleration change? How does the speed change? When is the maximum speed? When is the maximum acceleration It starts with the contact spring

A small ball fell from the air onto a spring placed vertically on the ground and asked what would happen to the state of the ball How does the acceleration change? How does the speed change? When is the maximum speed? When is the maximum acceleration It starts with the contact spring

The acceleration first decreases to 0 and then increases in reverse
2. When the ball is in the balance position of the spring, the speed is the maximum (the acceleration is 0, and the balance position is the length of the spring when the ball is still placed on the spring)
3. The maximum acceleration is when the spring is compressed to the lowest point, because the force is the maximum, a = f / m
Starting from the contact spring, the small ball should be accelerated with the decrease of acceleration (because the elastic force of the spring is increasing, while the gravity of the small ball remains unchanged), and then decelerated with the increase of acceleration until the speed of the small ball is 0 (when the small ball crosses the balance position, the spring force is greater than the gravity of the small ball), Then, the acceleration is reduced (because at the beginning of this stage, the spring force is greater than the gravity of the ball, so the ball will be bounced up, but as the ball rises, the spring force decreases until the spring force becomes zero)