Calculating the expectation value of the product of position and momentum, an ambiguity arises because it is not apparent which of these two expressions should be used:

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction