A 5 kg block is projected upwards with an initial speed of 10 m/s from the bottom of a plane inclined at 30 with horizontal . The coefficient of kinetic friction between the block and the plane is 0.2 a. How far does the block move up the plane ? b. How long does it move up the plate ? c. After time from its projection does the block again come to the bottom ? What speed does it arrive?

