In fig. la and fig.1 b above, Ida and Wb represent the respective loads...

In fig. la and fig.1 b above, Ida and Wb represent the respective loads on a spring placedtiear a 30 cm rule, when in air and when in water:

(a) Identify the force causing a shrink in the spring in fig.(b).

(b) Given that the force constant of the spring is 2.0 x 10(^{11}) Nm(^{-1}), calculate the work done by the force in causing the shrink.

(a) The force causing a shrink is the upthrust of the water.

(b) Work done = (frac{1}{2}ke^2)

= (frac{1}{2}(2 times 10^{11}) times (2 times 10^{-2})^2) = 4.0 x 10(^7)

In fig. la and fig.1 b above, Ida and Wb represent the respective loads…