A block (M) of mass m = 16.0 kg is
launched horizontally on a rough
surface BC with an initial speed
V,= 15.0 m/s. The speed of (M)
decreases and becomes zero when
(M) reaches a point C. The
magnitude of the frictional force
exerted by BC on (M) is f, = 140 N.
The block continues its motion along the frictionless inclined plane CD which makes an angle of 37. 0°
with the horizontal. Use: sin 37. 0°=0.600
When (M) reaches D, it continues its motion along a horizontal frictionless path DE.
a) i. Determine the nature of the motion of (M) along BC.
ii. Calculate the length of BC.
b) i. Determine the acceleration of (M) along CD.
ii. (M) needs 4.00 s to travel the distance CD. Calculate the distance CD and the speed of (M)
at point D.
c) Assume that the speed at D does not change as (M) pases from CD to DE. The time needed by
(M) to travel the distance DE is 2.00 s. Determine the distance DE.
d) Determine the average speed for the whole motion between B and E.​