Two blocks of masses 1 kg and 2kg are connected by a metal wire going over a smooth pulley as shown. The breaking stress of the metal is 403π x 106 Nm-2. If g = 10ms–2. Then what should be the minimum radius of the wire used if it is not to break?

# Two blocks of masses 1 kg and 2kg are connected by a metal wire going over a smooth pulley as shown. The breaking stress of the metal is . If g = 10ms–2. Then what should be the minimum radius of the wire used if it is not to break?

1. A

0.5mm

2. B

2mm

3. C

1mm

4. D

1.5mm

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### Solution:

$⇒$r2 = 10-6 $⇒$ r = 10–3 $⇒$ r = 1mm

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