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The object m moves on a smooth plane under the action of a constant force F along the horizontal direction, and a light spring with enough length is fixed in its forward direction When the object contacts the spring, it contacts and presses the spring to the shortest distance Block a decelerates when it contacts the spring Block B accelerates first and then decelerates when it contacts the block C when the velocity of the block is zero, the resultant force is zero D when the spring is in the maximum compression, the acceleration of the block is exactly equal to zero
The elasticity of a is not as big as that of F, so acceleration is better
B accelerates first after contact, and decelerates when the elastic force is greater than f force
C when the speed of the object is zero, when the compression is the shortest, the resultant force is zero and the speed is the maximum,
D compresses to the shortest, the elastic force is the largest, the acceleration is not zero, and the elastic force is larger than F
You should choose B
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