Recent content by ZAMM

The difference between them? but if it is that, what I calculated is not energy "used" but more wasted.

At the top PE=mgh=26*9.8*2=509.6J and at the bottom KE=.5*26*4^2=208J. Energy is greater at the top than at the bottom.

I know it only deals with vertical displacement but in this context the energy that requires him to get from the top to the bottom (neglecting the slide) would be mgh, but this alone does not help me solve the equation.

OK, so at the bottom of the slide E=.5(26)(4)^2 but I'm still confused. The length of the slide has 2 components? is the horizontal component the frictional component? I have no clue.

At the top would be the potential energy so 26*9.8*2, but this would be the energy output (I think). That's not really what i) is asking. At the bottom would also be the same but in kinetic energy form.

A child of mass 26kg is traveling at 4.0ms at the bottom of the slide which is 2m vertically below the top. The length of the slide is 6m. Calculate i) The energy used in overcoming the friction during the child's descent ii) The magnitude of the frictional force. Totally confused...