Maximum height of rolling hollow ball and kinetic energy of rolling sphere

[BMW25]

two question important !

1) A hollow ball is rolling along a horizontal surface at 3.4 m/s when it encounters an upward incline. If it rolls without slipping up the incline, what maximum height will it reach?
h= ...meter

2) A solid 2.4 kg sphere is rolling at 6.6 m/s . Find (a) its translational kinetic energy and (b) its rotational kinetic energy.


pleeeeeeeeeeeeease help me with that as soon as possible

 

[mgb_phys]

1, What is it's kinetic energy - if it stops at the top of the incline all this goes into potential energy what is the height.

2, You need the equation for rotational ke of a solid sphere (it's in wiki or your textbook)
Then since it is rolling you can get the radius from considering how fast a point on the circumference is moving along the plane.