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                                    28.A small block 'B' is placed oranother block 'A' of mass 5kgand length 20cm. Initially theblock B, is near the right endof the block 'A' A constant hori- 10NAzontal force of 10N is appliedto the block 'A: Allthe surfacesTTare assumed friction less. Thetime elapsed before the blockB' separates from A' isa) 0.2 sec b) 0.45 sec c) 0.1 sec d) | 
                            
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