Using the Venturi-meter, the ratio speed of fluid is
A1
A2
= 3 and the difference in height is 0.4 m while g= 10 m/s2. The speed of fluid is ?

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.