In the figure a block slides along a track from one level to a higher level, by moving through an
intermediate valley. The track is frictionless until the block reaches the higher level. There a frictional
force stops the block in a distance d. The block's initial speed vo is 6m/s. the height difference his
1.1 m and the coefficient of kinetic friction p is 0.6. The value of dis :

(A) 1.71 m
(B) 1.17 m
(C) 7.11 m
(D) 11.7 m

An experiment was performed on a 2-kg block. forces of 5, 10 and 15 newtons respectively were applied to the block for 5 seconds. describe the difference in acceleration between the three trials. a) the final accelerations will all be the same. b) the final acceleration will triple between the first and third trial. c) the final acceleration will be cut by 1/3 from the first to third trial. d) the final acceleration will increase nine time between the first and third trial.