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OBJECTS MOVING DOWN RAMPS In each case, a 1-kg object is released from rest on a ramp at a height of 2 m from the bottom. All of the spheres roll without slipping, and the blocks slide without friction. The ramps are identical in Cases A and C. The ramps in Cases B and D are identical and are not as steep as the others. A B C D Solid sphere ad ed Hollow sphere 2n 2 m 2 m 2 m Rank the speed of the objects when they reach the horizontal surface at the bottom of the ramp. OR 2 3 4 All All Cannot Greatest Least the same zero determine Explain your reasoning. 2 BLOCKS ON ROTATING DISC A block is placed on a rotating disc and moves in a circular path. The discs have the same rotation rate in each case, but the masses of the blocks and their distance from the center varies. A B C D - R = 2 cm - R= 3 cm - R = 5 cm - R = 2 cm m = 6kg m = 4 kg m=1kg m = 5 kg Rank the magnitude of the frictional force on blocks by the discs. OR 2 4 All All Cannot Greatest Least the same zero determine Explain your reasoning