Two problems of changing from a state of rest to a state of uniform linear motion

1.When the object is pushed, because the object does not receive any resistance, the object only receives that thrust, so it changes from rest to motion, and becomes no longer thrust after moving, because it has inertia, it must maintain the property of the same state of motion (the magnitude and direction of velocity are unchanged), and there is no resistance to change its state of motion, so it will always move in a straight line at a uniform speed. 2.

As I just said, the change of speed is also called the change of the state of motion, and the magnitude and direction of the velocity are both the motion state of the object, so the change from the rest velocity of 0 to the uniform motion is also called the change of the motion state, but the rest should also be called the uniform linear motion state, the rest of the motion speed is unchanged to 0, and the direction of motion is unchanged, so it is also a uniform linear motion state.

1. Linear motion at uniform velocity (Newton's first law).

2. Calculate (the state of motion includes speed, so if the speed changes, the state of motion will change).

1.Linear motion with uniform velocity Since there is no external force acting on the velocity can be obtained from f t=mv.

2.Because he must have been subjected to an external force.

1 There is no resistance, there are other types of forces, is there a gravitational force? It's very unclear.

If there is no external force, it must be a uniform linear motion.

2 definitely counts! The change in the magnitude and direction of the motion speed of the object is a change in the state of motion.

1.Answer: It is a uniform linear motion. 2.Answer: It is a change in the state of movement.

Uniform linear motion.

Either stationary or doing uniform linear motion is in equilibrium, so it does not change.

1. Uniform linear motion (no force changes its state of motion).

2. Count, there is velocity in the element of motion, and the magnitude of velocity has changed.

1. If the thrust is maintained all the time, it is a uniform acceleration linear motion, and after the thrust is removed, it is a uniform linear motion.

2, of course. Moreover, in reality, it is basically impossible for a state of rest to become a state of uniform linear motion without an intermediate transition state.

It belongs to uniform linear motion, no resistance is the same as no power, he has been moving according to the original speed, from stationary to uniform linear motion is regarded as a change in the state of motion.

1. Because there is no external force, it is a uniform linear motion.

2 count, because the state of motion refers to the direction and speed of movement. Forget it, of course.