At a playground, a child slides down a slide that makes a 42° angle with the horizontal direction. The coefficient of kinetic friction for the child sliding on the slide is 0.20. What is the magnitude of her acceleration during her sliding? Ok so I tried to use the equation ax=-Uk*g to find the acceleration and that did not work any pointers on how to start this I drew a picture but that didnt help? I think the problem is missing some information.