Physical

There is a snow avalanche in the shape of a gigantic snowball which has ceased to collect moss, being 123G kg and occupying 5.6 meters radially. Its moment of inertia. I = =mr'. Assume It began rolling at 20 meters per second and ended up going 35 meters per second at the base of the mountain. 7. What is the change in merely rotational kinetic energy of the snow avalanche? 8. What is the value of total kinetic energy at the bottom of the mountain? 9. Is there a gain or a loss in work done by the avalanche based on the W-AKE Theorem? 10. If there was friction on the ground due to grass given the sun had melted all the shallow snow what would the coefficient of friction, u, need to be in order to slow the avalanche down to a velocity of 25 meters per second within 2.05 km? Assume g - 10- Final answer needs to be 4 decimal places