Question 14 to 16.
14. The potential energy in an elastic string of force constant k which has been extended by x metres is expressed as (a) \frac{1}{2}kx^{2} (b) kx^{2}(c ) kx (d)
\frac{1}{2}kx
15. The point beyond which stretched spring does not return to its original length is called the (a) breaking point (b) spring constant (c) elastic limit (d) clasticity point.
16. The compressibility of a material
(a) the product of volume and its pressure (b) the fractional change in volume per unit pressure (c) the change in pressure per unit change in volume strain (d) none of the above
14. The potential energy in an elastic string of force constant k which has been extended by x metres is expressed as (a) \frac{1}{2}kx^{2}
15. The point beyond which a stretched spring does not return to its original length is called the (c) elastic limit.
16. The compressibility of a material is (b) the fractional change in volume per unit pressure.