Question 9 5 pt A 5.0-kg ball falls to the floor. When it is 1.70 m above the floor, its potential energy exactly equals its kinetic energy. How fast is it moving? O 5.8 m/s O 45 m/s 3.7 m/s O 14 m/sQuestion 10 5 pts A 18.0-N weight slides down a rough inclined plane which makes an angle of 29.0 with the horizontal. The weight starts from rest and gains a speed of 15.0 m/s after sliding 150 m. How much work is done against friction? Use g = 10 m/s2 O - 229 J O 229 J O -1500 J O 1100 J ( 1500 J