The difference between the increment of momentum, the change of momentum and the change of momentum is mainly in the aspects of sign and scalar vector Don't ask me anything else. I can't understand it. A classmate asked me to check for him. He said so. I don't understand. I can't check,

The difference between the increment of momentum, the change of momentum and the change of momentum is mainly in the aspects of sign and scalar vector Don't ask me anything else. I can't understand it. A classmate asked me to check for him. He said so. I don't understand. I can't check,

The increment of momentum is the final momentum minus the initial momentum, which is a vector without sign
The change of momentum is the final momentum minus the initial momentum, and then the scalar is taken. The direction of change is positive in the reference direction
Momentum changes as long as the direction and size change