AHA! sneaky sneaky tips..
So I found the change in gravitational potential energy = -(m)29.8704
and the change in Kinetic Energy = .5(m)Vfinal^2
I'm looking at my notes and it seems there is this equation for the conservation of Mechanical Energy
change in Kinetic + Change in...
Well when I get the potential energy at the top, I use Ug=mgy. So Ug= (m)(9.8)(10). I got 10 since the ladder is 20 ft long and the incline is 30 degree which makes the initial heigh 10. The kinetic energy at the top would be 0 since he's not moving? So how do I get the change in kinetic energy...
SO how I see it, is It is a 30-60-90 triangle with gravity acting on the Child on top of the slide. Since it asks what is at the bottom, the height is 0ft or the velocity initially is 0 which makes the equations I use become zero. I'm sorry if this is really wrong but I'm getting really confused...
As in the Net work is equal to change in kinetic Energy? I understand using that but what throws me off is that there is no mass to use it with the equation. I'm thinking it is just kept as the variable?
Homework Statement
Hi guys! Here is my problem:
A Children's slide is 20 ft long and makes an angle 30° with the horizontal. If the coefficient of sliding friction is 0.05 and the child starts from rest at the top, with what speed does he reach the bottom?
I want to say it is about...