A block of mass 3.0 kg moves along a frictionless track which has a dip 0.7 m below the original level of the track and then a plateau 1.0 m above the original level of the track. The initial velocity = 7.5 m/s.
a) What is the velocity at the hight point?
b) How far does the block move before it stops if the plateau has friction of uk=0.45?