At a playground, a 21kg child plays on a slide that drops through a height of 2.4m . The child starts at rest at the top of the slide. On the way down, the slide does a nonconservative work of -376J on the child. What is the child's speed at the bottom of the slide?
Change in Kinetic energy + change in potential energy = nonconservative work
The Attempt at a Solution
[0.5(21)(v^2 - 0)] + [(21) (9.8) (0 - 2.4^2)] = -376
Therefore v = 8.77m/s
But the answer is wrong. Could someone help ??/
Thanks in advance