If two objects M1 and M2 connected by light springs are placed on a smooth plane, the masses are not equal. If force F pushes M1, will the springs be compressed? M1 = = = = M2 use constant force F to push M1 to the left. Because the plane is smooth, M2 is not subject to friction and can't give the spring a left force, so the spring can't be compressed. At this time, they can be regarded as a whole. Is it true that the spring won't be compressed? If one side of a spring is fixed on the wall, the other end of the push will be compressed, Because the wall gives it a force. And the above problem is smooth, is it not compressed?

If two objects M1 and M2 connected by light springs are placed on a smooth plane, the masses are not equal. If force F pushes M1, will the springs be compressed? M1 = = = = M2 use constant force F to push M1 to the left. Because the plane is smooth, M2 is not subject to friction and can't give the spring a left force, so the spring can't be compressed. At this time, they can be regarded as a whole. Is it true that the spring won't be compressed? If one side of a spring is fixed on the wall, the other end of the push will be compressed, Because the wall gives it a force. And the above problem is smooth, is it not compressed?

Of course, it will compress. No matter what position and environment the object is in, to change the state of motion of the object, it must have a strong effect. This is what master Niu said. With a strong effect, the spring will be compressed of course. You can also think like this. First of all, if you think as a whole, the whole will be accelerated under the action of the force. Then when you separate