Question

Canvas Å D Question 1 1 pts How large a force is necessary to stretch a 20-mm-diameter steel wire (E-20_1041 Nm) by 10%? 31X10'N 13x10'N 63x10'N 94x10'N 3.1x10 N D Question 2 1 pts A solid has a volume of 80 cm (1 cm) - 10m) When weiched on a spring scale, the scale indicates &ON. What does the scale indicates if the object is weighed while immersed in a liquid of density 2000 kg/m? 3.4N 64N 24N 54N

Answer 1

Given , -3 radius 2x10 m. 2 mm 2 Modulus CE) OT 2 x 10" N/m² Elasticity increase in length & and AL L 1% = 0.01 So TA / ALL F = Ex A x DL L - Q x 10" X ax x 10-3) (2 x 10-3)?) xО:0) - 2 x 10 x 3.14 x 214 x 10-6 3 6.28 x 10 N 6.3 x 103 N Option 3 Correct.

Volume Bocm3 80 x 10 -6m² also weight V Solid 8 N Now in liquid of density when Solid immened 2000 kg/m3. then mais y Solid Density y liquid Mass Volume Box 10-6m 3 2000 kglon? 0.16 kg. Hence Neight Solid 0.16 kg x 9.8 m52 1.568 N. 106 N. Scale Hence immersed in indicates if the object is weighed whil liquid (8N -16 N) 6.4N. option 3 is Correct.