Question

5(a) The force causing a shrink in fig 1(b) is the upthrust of the water. Given: force constant k = 2.0x10^11 N/m, extension x = 2cm = 2x10⁻² m. Calculate the work done by the force in causing the shrink.

Model answer

Work done by force causing the shrink is given by W = ½kx² = ½ x 2.0x10^11 x (2x10⁻²)² = 4x10^7 J.

Accepted Answer

Work done by force causing the shrink is given by W = ½kx² = ½ x 2.0x10^11 x (2x10⁻²)² = 4x10^7 J.

WAEC Physics 2011 Theory — Question 9

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