Which of the following measure is more accurate? 500.00kg, 0.0005kg,6.00kg

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

The two required components for a generator are

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.