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A block is suspended from a pulley and the tension in the rope is 86.6 N (see figure (a)). In figure (b) the block is pulled at constant velocity. Now what is the tension in the rope? 86.6 Did you draw a free body diagram for each situation and identity all forces acting on the mass? What is the net force acting on the block in each case? N

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For fig. (a),

2T = mg

=> 2* 86.6 = m* 9.8

=> m = 17.67 kg

For fig.(b),

Since velocity is constant, acceleration is zero. So,

T = mg

=> T = 17.67 * 9.8 = 173.166 Newton

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