hai swings a ball in a vertical circle at the end of a string that always remains taut. at the top of the circle, the centripetal force on the ball is

What are two different ways you could find the value of a? explain these methods.

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.

What is the increase in density of a medium due to wave travel?