Q. A 2-kg aluminium block and a 6 kg copper block are connected by a light string over a frictionless pulley. They sit on a steel surface, where O= 30. When are rela=eased from rest will they start to move? If so resolve their acceleration and the tension in the string If not determine the sum of the magnitudes of the forces of friction acting on the blocks.
Q. A wheel 55-cm in diameter accelerates uniformly from 240 rpm to 395 rpm in 5.0 s. How far will a point on the edge of the wheel have travelled in this time?