A child on a swing moves at 6.5 m/s at the very bottom of her motion. Assuming she doesn’t pump her legs or get a push, what is the maximum height she can reach? (Assume there’s no air resistance or friction.)

What happens in a global convection cell

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.

Which of these is the best way to manage a natural resource