Using what you have learned about the many models developed to describe an atom, infer why the model had to change as new information came to light? Defend why this is true or false of all scientific models and theories.

An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.