A 2-kilo block is released from rest at the top of a curved incline in the shape of a quarter of a cricel of radius R. The block that slides onto a horizontal plane where it finally comes to rest 8 meters from the beginning of the plane. The curved incline is frictionless, but there is 8-newton froce of friction on the block while it slieds horizontally. Assume g = 10 meters per second Required:
a. Determine the magnitude of the acceleration of the block while it slides along the horizontal plane.
b. What time elapses while the block is sliding horizontally?